So what if you’re someone who wants to watch the big game in HD, but without skimping on the basic luxuries like food and clothing? Well, we’ve found some options for you.

For one, the government postponed the date when broadcasters switch to digital TV signals to June 12 from February. That means that we’ll likely see TV manufacturers and retailers continue to discount new flat panel TVs to lure those of us who haven’t yet upgraded from the bulky old-school tubes.

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This week at CES, Netflix announced Korea’s LG Electronics will let viewers tune into the Netflix service through an upcoming line of HDTVs. A Netflix deal also announced this week with another television maker, Vizio, could be even more interesting because some of those sets will be able to get onto the Internet wirelessly, a technology that will make it much easier to get online than sets with only wired Internet connections.

“I think it will double or triple the percentage of people who have those devices and hook them up to the Internet,” Hastings said, over a cup of gelato at a café in the Venetian hotel.

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The Kodak Theatre HD Player’s motion-sensing pointer remote works much like a mouse on a TV screen.

This week I tested the Kodak Theatre HD Player, the photo-centric company’s attempt to snag valuable real estate in the living room. This small, black box pulls photos and videos from computers around the house and displays them on an HDTV. It also enables the sending and receiving of photos via Kodak Gallery, and connects to Web-based photos stored on Flickr, Facebook, Picasa, .Mac and others. Podcasts, Internet Radio and updates from news feeds, weather forecasts and stock quotes are also accessible using the HD Player. And it has a terrifically simple motion-sensing remote that works like using a mouse on a TV screen.

But the HD Player isn’t all smiles. Its $299 price doesn’t include any built-in storage for keeping content directly on the device. It currently has no way of accessing HD movies or television shows, nor will it work with Macs. In comparison, Apple’s (AAPL) $229 Apple TV has 40 gigabytes of storage, can access HD television shows and movies via the iTunes Store, and works with Macs and Windows PCs. This is important because as budgets tighten in the current economy, gadgets have to prove their value and versatility more than ever.

After using the Kodak Theatre HD Player with Windows XP and Vista machines over the past week, I can conclude that this device’s interface shines in its simplicity and is a lot of fun to use. Kodak teamed with Hillcrest Labs to make the player’s motion-sensitive remote and corresponding software, which includes satisfying extra features like images that automatically magnify when the remote control’s cursor points at them and icons that make chirping sounds when selected. The remote itself is shaped to rest comfortably in a hand and has three simple buttons and a scroll wheel.

Quick-access memory-card slots for six types of memory cards appear on the box’s front, and two USB ports can connect to digital cameras or USB storage devices.

Currently, the player’s software works directly with Flickr, RadioTime (8,750 radio stations) and FrameChannel, which grants access to various “channels” like Facebook, .Mac, Picasa, People.com news and National Geographic. Kodak says it will incorporate YouTube access in January; I got a sneak peek at the interface for this and it looks well-organized.

Yet the HD Player’s smart combination of software and remote left me wishing it did a bit more. Photo sharing is enabled only via Kodak Gallery, so you can’t use another Web-based account to share photos directly from your TV. Likewise, a blue light on the box slowly blinks only when new Picture Mail (a message containing shared photos) is received on a Kodak Gallery account, not when new photos are added on other sources such as Flickr Photostreams or Facebook pages.

The Home screen of the HD Player shows four categories: Pictures & Videos, Kodak Gallery, Music and Entertainment. Subcategories are where you might guess they would be, for example podcasts are listed under Entertainment. And a tiny Home icon appears in the top right corner of every screen so you can always get Home with one click. The Pictures & Videos category holds photos and videos from a currently selected Windows PC.

An unlimited number of Windows PCs can wirelessly pair with the player as long as they have special Kodak software installed on them. But only one PC’s content can be accessed at a time. I toggled between two paired computers without a problem, but would’ve preferred accessing music and photos from both sources simultaneously.

The HD Player’s motion-sensing pointer remote works much like a Wii remote control. Wherever you move it, a tiny leaf-shaped cursor appears on-screen. A Hide button on the remote will hide the cursor while you watch slideshows. The remote’s Back button is helpful; when pressed, it backs you out of one screen using visual effects that make the screen shrink into the TV as if you were moving backward.

A play button appears on the first photo in a folder so users can select this icon to quickly start slideshows. Whenever the HD Player receives new Kodak Gallery Picture Mail, or a slideshow is created on a connected PC, yellow alert circles appear on the screen to notify users and a number in the middle of these yellow circles indicates how many new items are available for viewing.

Some content on my PCs took a little while to be recognized by the HD Player, including podcasts that I subscribe to on iTunes. When they did show up, both audio and video podcasts played without issue and on-screen playback buttons made them easy to control.

The HD Player uses your photos to create automatically generated slideshows, called Picture Chronicles, once a week. These Picture Chronicles use up to 50 photos from the same time of year in all of your folders, for instance grouping all Thanksgiving photos together from the past five years.

Kodak has plans to make its player Mac-compatible in the future and also hopes to add other partnerships with new types of content following its YouTube announcement early next year.

The Kodak Theatre HD Player does its job well, bringing photos and videos that might otherwise live only on your PC to your big screen HDTV. For the holidays, this device could be a real plus. But Kodak has some work to do to make this a more useful Web-connected tool.

Edited by Walter S. Mossberg

• Email us at mossbergsolution@wsj.com. Find this and other columns and videos online free at the All Things Digital Web site: http://walt.allthingsd.com

I am in the market for a new HDTV and the newspaper ads are using terminology that I’m unfamiliar with. Do TVs rated at “720p” provide the same quality picture as those rated at “1080p”?

Technically, the answer is no, but it may not matter. The 1080p resolution is certainly higher, but almost nobody can tell the difference between the same material shown in the two resolutions on TV screens up to around 50″ in size and at the typical distances from which people watch those screens. Not only that, but most sources of video content, with the exception of Blu-ray discs, can’t even fully utilize 1080p. Major TV networks don’t use it yet because it requires a lot of bandwidth.

If you can afford a set that can handle 1080p, you might want to buy it so that you are ready in case a lot of 1080p content one day becomes available. You might also want a 1080p set if you are a videophile; have an enormous screen or a projector that fills a large wall; or if you play a lot of Blu-ray discs and believe you can discern the difference on a typical-sized screen. Otherwise, you could save money by buying a 720p set and you might never know the difference.

In 2006, you recommended a powerline adapter for Internet access by Netgear, the XE104. Is this still a good buy or are there others by now that are better?

I haven’t tested powerline adapters, the gadgets that route computer networks over standard home electrical wiring, since that date. Netgear and its competitors — such as Linksys and Belkin — have, naturally, come out with newer, faster units since then. But I am still personally using the XE104 successfully and feel I continue to get my money’s worth from it. It is still being sold. The newer units typically have greater speed in order to do a better job of streaming video around a home, but they work in basically the same way.

I have a Windows XP system, and things work well with my cable modem in my office. But when I’m on the road using Wi-Fi, I can receive emails, but can’t reply or send out. Any idea on how to resolve this problem?

This usually happens because the Wi-Fi provider is blocking the outgoing email server (called an “SMTP” server) that you or your IT department has set up in your email program. Some providers block all such outgoing servers. There are a number of possible solutions. The simplest is to use a Web-based email service, like Gmail or Yahoo Mail, or the Web-based version of your usual service. If your email is provided by your company, you may be able to access a version of Microsoft Outlook over the Internet that will work.

Another possibility is to ask the provider at the hotel or airport what SMTP server it does allow — usually its own — and enter it into your email program’s settings, if you know how. Yet another option would be to use a data card from a cellphone carrier, which I have found can usually overcome this problem. There may be other workarounds, and I invite readers to suggest them.

You can find Mossberg’s Mailbox, and my other columns, online, free, at the new All Things Digital Web site, http://walt.allthingsd.com.

For the quarter, the company posted revenue of $2.91 billion, right in line with expectations, and profits of 75 cents a share, nicely above the Street consensus at 60 cents.

But the company also noted that it lost 25,000 net subscribers in the quarter. In a 10-Q filing with the SEC this morning, the company blamed the surprise drop in subscribers on “weak economic conditions, aggressive promotional offerings by our competition, the heavy marketing of HD service by our competition, the growth of fiber-based pay TV providers, signal theft and other forms of fraud, and operational inefficiencies at DISH Network.”

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In an astonishingly unimaginative report called “The Future of Apple Inc.,” Forrester attempts to divine the products Apple will be peddling five years from now. “Apple will aim to become the hub of the digital home, offering eight key products and services to connect PCs and digital content to the HDTV-stereo audio-visual infrastructure in consumers’ homes,” Forrester explains. “To fulfill this strategy, we predict that Apple will launch new products, re-engineer the Apple Store, and expand into in-home installation services.”

Sadly, the speculative product and services roadmap Forrester has devised seems more a roadmap to ruin than anything else, and a laughable one at that. Among the products the company sees Apple developing by 2013:

• A network-enabled “clock radio”
• An AppleSound universal music controller
• A digital picture frame
• A “Genius Bar” that makes house calls just like the Geek Squad.

Huh. So Apple, after reinventing the desktop UI, the digital media player, and the phone, will set its sights on the lowly clock radio and picture frame. Really? If Apple’s product dev team pitched Forrester’s clock radio idea to CEO Steve Jobs, he would probably hurl them one-by-one into rush-hour traffic from the roof of 1 Infinite Loop.

Forget next month. It’s more fun thinking about what digital toys Apple might be making in five years. Of course, Mr. Jobs’s penchant for secrecy means such predictions are often little more than daydreaming. Just do an Internet search for “Apple” and “mockup” to see photos of products invented by Apple fans.

Forrester Research (FORR) is the latest to look into the crystal ball in a new report that imagines the Apple products of 2013. But rather than predict Apple jet packs or other outlandish new directions, the research firm uses the company’s recent history as a guide to forecasting.

Forrester’s conclusion: While much of Apple’s great successes have been mobile products such as the iPod and the iPhone, the company will seek to colonize rooms throughout the home.

Among the new products Forrester predicts Apple will create are wall-mountable digital picture frames with small high-definition screens and speakers that wirelessly play media, including photos, videos and music, stored on a computer elsewhere in the home. Such products already exist, but Apple could put its own twist on them — for example, by adding its design panache and a touch-sensitive screen that lets viewers flip from image to image with a finger swipe, a la the iPhone.

For the bedroom, Forrester envisions an Apple “clock radio” that pipes in music and other media across a home network. Possible, too, is an “AppleSound” universal remote control, also with a touch-sensitive screen, that lets users browse their music collections and change the songs playing through their stereo as they stroll around the house. This latter technology is already available in primitive form through an application called Signal (www.alloysoft.com) that turns the iPod touch and the iPhone into remote controls for Apple’s iTunes program.

Forrester also thinks Apple could extend into the home the technical assistance currently offered by “Genius Bar” personnel in Apple retail stores. Apple in-home installation services will become especially important as its array of products for the home grows. “The complexity level here can be quite daunting if you have five or six of these different devices,” says J.P. Gownder, one of the Forrester analysts who wrote the report.

An Apple spokeswoman declined to comment on the company’s product plans.

Apple prognosticating is such a popular pastime, in part, because Mr. Jobs has proved so adept at becoming a power broker in markets a Silicon Valley computer company — once known as Apple Computer — has no right to dominate. The iPod remains the top MP3 player, with more than 70% of the market, and Apple is now the top retailer of music in the nation, ahead of Wal-Mart (WMT) Stores. Less than a year after entering the cellphone business with the iPhone, Apple became the second-largest provider of smart phones in the U.S.

That said, the company had an underwhelming foray into the living room with a television set-top device called Apple TV that plays music, photos and movies downloaded from the Internet and PCs on a home network. In an interview earlier this year after dropping the price on the product by $70 to $229, Mr. Jobs said he was disappointed in its sales.

Despite the hiccups, veteran observers of Apple say Mr. Jobs’s intent is clear. “I see everything Steve is doing as positioning himself to take over completely the living room,” says John Seely Brown, a visiting scholar at the University of Southern California and the former director of Xerox’s PARC, the Palo Alto, Calif., research center that inspired some of the innovations of the original Macintosh.

One long-running prediction, proved wrong again and again: that Apple might make a television set. Forrester throws cold water on the idea. Yet some still believe that Apple will one day get into the business as conventional TV makers start to integrate into their sets the ability to surf the Web. Apple already designs computer displays that are as large as some HDTVs.

Steve Wozniak, the co-founder of Apple with Mr. Jobs, says it would make “a lot of sense” for Apple to do a television set that can also access media stored on the Internet and local PCs. “I only started thinking that way recently,” Mr. Wozniak says. “Apple is obviously in the world of delivering display devices already.”

Mr. Brown thinks Apple could simplify the traditional functions on TV sets, like the bewildering electronic programming guides that list the hundreds of channels available to viewers. “Most people find operating high-quality TV systems incredibly awkward,” he says. “They’re as bad as our computer systems.”

• Send comments to Nick.Wingfield@wsj.com. Walter S. Mossberg will return on June 5.

Q. Is there any way to watch high-definition TV on a Mac in real time — not downloaded from a service?

A. As on Windows computers, there are add-on TV tuners for Macs that can both receive and record TV programs in real time. Some of them can handle high-definition programming. The best-known company that sells such tuners for the Mac is called Elgato, at elgato.com.

Q. I’m interested in your perception of the Treo’s future. I currently use (and generally like) a Treo 650. I’d like to upgrade, but I’ve read recently that Palm’s future is uncertain. I wonder if you think the Treo is on a slippery slope down, while the Apple iPhone will likely improve.

A. I do believe that Palm has allowed its software to stagnate and hasn’t moved fast enough to make its hardware thinner and cheaper. However, there are also some positive signs at Palm. Its new Centro phone is pretty good, smaller and less costly than a Treo. And the company is receiving an influx of funds and talent from a group of outside investors with experience at Apple, among other places.

Palm’s fate and future may depend on the success of a project it has undertaken to create an entirely new operating system. But the outcome of that effort won’t be known for quite some time.

The iPhone, which is already very good, will likely get better, as it is just at the beginning of its life. It has raised the bar for other smart-phone makers, such as Palm, especially when it comes to software. But I expect other companies to match at least some of the iPhone’s features and style, which means Apple will have to hustle to keep its lead. In the past five years, Apple has done very well at staying ahead of competitors in the design of its computers and portable music players. But the cellphone business is full of companies with more imagination than the typical PC maker and more resources than many makers of portable music players, so the challenge for Apple will be greater.

Q. My mom is legally blind and has difficulty working with email and downloading files. I try to help her by phone, but it never works, and we live far apart, so I can’t just go over to help her. I would like to install an application on her PC where I can take over remotely from home. Do you have any suggestions for this type of application?

A. There are a number of possibilities. One very simple option is a program called CrossLoop, at crossloop.com. Some versions of Windows, such as Windows XP Professional and Windows Vista Ultimate, also have remote desktop control built in.

You can find Mossberg’s Mailbox, and my other columns, online for free at the new All Things Digital Web site, http://walt.allthingsd.com.

Write to Walter S. Mossberg at mossberg@wsj.com

The trouble is, it’s hard to find a DVR that can record in high definition, so most people wind up simply going with the bare-bones high-definition DVR capability built into the set-top box supplied by their cable or satellite service.

But TiVo, the pioneer in digital video recording, has recently entered the high-definition recorder market with a high-end, high-priced product. It’s called the TiVo Series3 HD Digital Media Recorder and it sells for a whopping $800, as much as some HDTVs themselves. And that doesn’t include the $12.95 a month it costs to subscribe to TiVo.

I’ve been testing the new TiVo and I like it a lot, but it’s hard to swallow that huge price, especially since the new Series3 model doesn’t include some nice features available on the much cheaper Series2 version, which doesn’t record in high definition. It also can’t handle certain cable features.

So, why not just stick with the high-definition DVR supplied by the cable company? After all, while it isn’t free, it’s cheaper than the TiVo.

The answer is that, at least in my recent experience with the nation’s biggest cable company, Comcast, the high-definition DVR it supplies is just awful. If cable boxes were sold at retail like consumer-electronics devices, the Comcast DVR I tested, built by Motorola, would get creamed by better competitors.

My Comcast box, a Motorola DCT3412 I, which Comcast rents for about $12 a month, holds a maximum of 15 hours of high-definition programming or 60 hours of standard programming. The TiVo holds up to 35 hours of high-definition programs or up to 300 hours of standard.

Also, the user interface on the Comcast box is crude and confusing — nothing like the elegant interfaces people have become used to on their personal computers and devices like iPods. The TiVo interface, by contrast, is effective and attractive.

The worst problem is that the Comcast box flubs the basic functions of a DVR. It is maddeningly slow at responding to commands sent by the remote control to pause, play, fast-forward and rewind. You press pause and nothing happens. So you press it again. You try to return to normal speed after fast-forwarding through commercials and the unit takes so long to obey your command that you badly overshoot the resumption of the program.

This latency problem didn’t affect just one dud of a Motorola box. In our home, we have four of these units, and three have the problem. All, of course, share the capacity limitations and user-interface problems.

In the program grid, even on a 50-inch, high-definition screen with acres of room, the Comcast box displays just four rows of stations at a time. Until recently, there was a fifth row, but now that has been replaced by an ad. The ad not only sucks up space, but also is aggravating because it gets selected each time you reach the bottom of the grid screen.

Advertising is fine, but in this case, sacrificing 20% of an already paltry information screen for an ad just shows contempt for users.

By contrast, the basic TiVo grid shows eight rows of stations at a time, and offers an alternate view that packs in even more information using two vertical columns: one displaying stations and the other showing a list of shows scheduled in the coming hours.

And, unlike the Comcast box, the TiVo Series3 can be programmed from a Web site, so if somebody at the office tells you about a great show, you can tell the TiVo to record it long before you get home. The new TiVo can also play music and display photos that are stored on Windows and Macintosh PCs on your home network. The Comcast box can’t.

But the TiVo also has some downsides. Unlike older TiVos, it’s intended to replace, not complement, a cable box. So, installing it requires a visit from cable-company technicians to install gadgets called cable cards that plug into the back of the TiVo. In my case, that process took over two hours. Even worse, these cable cards don’t support Comcast’s on-demand feature, which allows you to see certain programs and movies whenever you choose.

And the new Series3 lacks the capability of cheaper TiVos to let you transfer recorded shows to computers and portable devices.

Also, unlike the Comcast box, the TiVo doesn’t have a filtered grid display showing only high-definition shows, which is handy once you become addicted to HD.

Fortunately, it may be possible to get some, but not all, of TiVo’s superior features by just waiting. In 2007, Comcast and TiVo expect to roll out an option for downloading TiVo software to Comcast boxes. This would provide the TiVo interface without sacrificing Comcast features such as on demand. The pricing and details haven’t been announced. Comcast is also working on other new user interfaces and features using non-TiVo technology.

But, for now, the choice is tough. The Comcast high-definition DVR is a cheaper, but flawed product and the TiVo Series3 is an excellent, but overpriced one.

Email me at mossberg@wsj.com.

This year, that tower of babble is higher than ever, as new terms have come into being, and old ones have come to the fore. So, here’s a quick glossary of some of the current techno terms you may encounter when shopping for a computer, television, digital camera or cellphone this holiday season.

Aero: This is the graphical user interface that’s a key part of Microsoft’s new Windows Vista operating system, due out around Jan. 30. If you want to get the full benefit of Vista, make sure any Windows PC you buy this season is capable of running Aero. Many are not.

Antiblur: Also known as antishake or image stabilization, this is a crucial feature of digital cameras today. Because few cameras have optical viewfinders, users tend to hold them at arm’s length to frame the shot on the LCD screen. This increases the likelihood of shaking the camera. An anti-blur feature can correct that. The best antiblur technology is optical. Digital versions are less effective.

Draft N: This is a new, faster, longer-range version of the popular Wi-Fi wireless networking system, and many new Wi-Fi products are built to comply with it. It succeeds the common “G” flavor of Wi-Fi. But, there’s a catch. As the name implies, this technology is based on a draft of the forthcoming new Wi-Fi standard, to be called “N.” And the final standard could be different enough to make Draft N gear outdated in 12 to 18 months.

Dual Boot: A computer that is configured to boot, or to start up, in two different operating systems, depending on which the user chooses at any one time. The most important example of this currently is on Apple’s Macintosh computers, which now can be set up to run either the Mac operating system or Microsoft Windows using Apple’s free dual-boot software, called Boot Camp.

Dual Core: A type of microprocessor — the brain that runs a computer — which packs the equivalent of two processors into a single chip. The best known dual-core processors in consumer computers are Intel’s Core 2 Duo and Core Duo, but rival AMD also makes them. They are a good bet for most people.

Flash Player: A small-capacity digital music player, like Apple’s iPod Nano and Shuffle. These players use flash memory, a type of memory chip that behaves like a small hard disk to store music, photos and videos. Larger players, such as the full-size iPod and the new Microsoft Zune, use actual hard disks, like the ones in computers. Flash memory is also what’s inside the small memory cards used in digital cameras.

HDMI: This acronym, for High-Definition Multimedia Interface, describes a new kind of cable for hooking high-definition TVs to things like cable boxes and DVD players. It provides a high-quality digital feed, and combines both audio and video signals via a single connection. When shopping for an HDTV, make sure it has HDMI connectors on the back.

HSDPA: An awkward name for a new high-speed cellphone network being deployed in the U.S. by Cingular Wireless. Its full name is High Speed Downlink Packet Access, and it’s intended to compete with successful high-speed networks from Verizon and Sprint called EVDO, or Evolution Data Only. All of these new networks allow Internet access at about the speed of a slow home DSL line, which is a big boost for cellphones. If you care about email and Internet access on a phone, and you are using Cingular, get a phone that can handle HSDPA.

Quad Band: A cellphone that handles all four bands, or frequencies, used in various countries by wireless phone companies adhering to a world-wide standard called GSM. Examples are Cingular and T-Mobile in the U.S., and Vodafone and Orange in Europe. A quad-band phone can be used on any GSM network anywhere, so if you travel overseas a lot, you may want one.

RAW: A file format for digital photographs that is uncompressed and largely unmodified by the camera’s chips, and therefore includes every detail of the color and image. It is prized by professional photographers and serious amateurs, who look for cameras and photo software that can handle the RAW format. But it produces enormous files, so most users should ignore it and stick with the very good, very common compressed photo format, called JPEG or JPG.

Shared Memory: A computer configuration in which the video circuitry lacks its own dedicated memory and must share, or drain off, a portion of the computer’s main memory. This is common in lower-price computers. It’s fine, but it reduces the amount of memory available to the nonvideo functions of the computer, so you may want to add extra memory to a PC of this type.

WAN: Any wide-area network, such as a cellphone network, that can be used to send and receive data. It is distinguished from a LAN, or local area network, such as the wired and wireless networks deployed inside a business or home. Some computer makers use the term for the built-in cellphone modems in their laptops.

Good luck with your gift shopping. Don’t get trapped in the tower of babble.

Email me at mossberg@wsj.com.

Here are a few questions about computers I’ve received recently from people like you, and my answers. I have edited and restated the questions a bit, for readability. My column last week about high-definition TVs generated intense reader interest, and hundreds of emails, many containing questions. So this is an all-HDTV edition of Mossberg’s Mailbox.

At the end of your HDTV column, you said that, after testing a borrowed plasma HDTV, you went out and bought your own HDTV. Don’t leave us hanging. What set did you buy? And do you get a discount?

I bought the same 50-inch plasma set I tested, the Pioneer Elite PRO-1140HD. But I want to emphasize that this is a matter of personal taste (which picture you personally prefer), budget, and the style and size of the room where it’ll be used. Other brands and other technologies are also very good, and some folks might prefer them.

I don’t accept free goods, or even discounts, from companies whose products I review, as that would be unethical. So, I went to a local store and bought the Pioneer at retail, like anyone else.

You didn’t mention a burning issue in the HDTV arena right now: whether to spend the extra money to get a set that can handle the highest resolution, called “1080p”. What’s your view on this issue?

I didn’t mention it because I don’t think it’s an important factor at all. Most HDTV sets max out at a resolution called “1080i,” which is gorgeous and is used by several of the TV networks currently broadcasting in HD. Theoretically, a resolution called “1080p” is even better (I won’t go into the boring techie details of the difference) and it will be used by some new gadgets, like certain game consoles and players that handle the new disk formats battling to succeed DVD. It can also be used by PCs connected to a TV set.

But there is no TV network using 1080p, or planning to use it, anytime soon. Plus, most people can’t tell the difference between 1080i and 1080p, especially at the distances at which people typically sit to view large-screen TVs.

So, unless you are a techie, or a hard-core gamer or videophile — or you plan to use your HDTV mainly as a PC screen — I see no reason to spend a penny extra, or wait a day more, just to get a set capable of handling 1080p. If you like a set for other reasons, and it happens to have 1080p capability, think of it as a bonus. But I wouldn’t make 1080p a major criterion for choosing a set.

You talked about getting HD content via cable or satellite, but I understand you can pluck HDTV shows right out of the air, for free. Is this true?

Yes, it is, for a limited number of channels. In most cities, local affiliates of the major broadcast networks, as well as public-TV stations, beam out special digital channels that carry HD versions of popular shows. These digital channels are also available on cable, but you don’t have to pay a cable bill to view them over the air. In some cases, you can also get over-the-air digital channels from local independent stations.

Many people love over-the-air HDTV, and some say it looks even better than HD programming delivered over cable and satellite.

However, there are some downsides. First, you have to install an antenna. In some cases, this can be a relatively cheap, unobtrusive indoor antenna, but in other cases you may require a roof antenna, or even a motorized roof antenna that rotates. More important, if you rely solely on over-the-air HDTV, you won’t have access to the cable networks, like HBO, ESPN, TNT, Showtime, and Discovery, that are broadcasting movies and TV shows in HD. And you won’t have access to the special cable and satellite sports packages that bring you all the games from all over the country, which look glorious in HD.

* * *

Because of the volume of email I receive, I can’t routinely answer individual questions by email, or consult on individual problems or purchasing decisions. I read all questions I receive and select three each week to answer in the column.

Write to Walter S. Mossberg at mossberg@wsj.com

To find out, my wife, Edie, and I lived for several weeks with a big, beautiful HDTV, the Pioneer Elite PRO-1140HD, lent to us by Pioneer Electronics. It has a 50-inch screen, a long list of features and lists for $5,000, though you can find it for under $4,000 on the Web.

I tested the Pioneer with digital cable service from Comcast, my local cable provider. This service transmits high-definition programs where available and can record them to a digital video recorder (DVR) built into its set-top box. Comcast also has an on-demand feature that allows you to watch certain programs whenever you like.

The test demonstrated why people are so hooked on HDTV. The Pioneer Elite set performed brilliantly and was a joy to watch with HDTV programming. With HDTV, you are not only increasing the size of the picture, but its quality as well. On the Pioneer, colors popped, details I never saw before emerged, and the whole experience was almost cinematic. DVDs looked great, as did content from a computer plugged into the set.

But there is a hitch: Most TV programs aren’t available in HDTV, and these non-HDTV shows can actually look worse on an HDTV set than they do on older, standard TV sets. So do most videotapes. Also, buying a big-screen HDTV carries hidden costs and hassles. You may well need help installing the set. You may also have to switch or upgrade your cable or satellite service, get a new DVD player and buy new furniture.

The Pioneer Elite model I tested happens to be a plasma TV, which is one of the three major types of HDTV sets. It works by stimulating a captive gas with an electrical charge. The other two are LCD, or liquid crystal display, which uses a screen like those on laptop computers; and “microdisplay” sets that project the image onto the screen from the rear of the set, mainly using two technologies: DLP, or digital light processing, and a form of LCD.

Plasma TVs tend to have the blackest blacks and the best ability to be viewed from all angles of a room. Their colors are warm and vivid. And they cost less than LCDs in large sizes. But their screens are more reflective and a bit darker than LCD screens. There is also a slight chance they can suffer “burn-in,” the permanent embedding of an image, like a network logo, if you leave such an image on for a very long time without changing channels.

LCDs are bright, and they are the thinnest and lightest of the HDTVs. But their colors often seem cold and their blacks too gray. Their viewing angles aren’t as good as with plasmas. And in some cases, fast motion can look blurry.

Microdisplay sets typically cost the least, but they are the thickest of the three types. They tend to have limited viewing angles and can display a “rainbow” effect, which causes problems for some people.

Our Comcast service gave us high-definition channels from all the big broadcast networks and some of the major cable ones. We immediately started watching shows like “Grey’s Anatomy,” “Desperate Housewives” and “Heroes” in high definition, and found they were greatly enhanced. Watching the World Series and NFL games was a great experience, with every clump of dirt, bead of sweat and blade of grass looking so much more real.

The Pioneer also did a great job with an Apple Mac Mini computer we plugged into it, displaying family photos and downloaded videos stored on the Mac.

The big downside was that only a small fraction of programming is high definition. At 8 p.m. on Tuesday night this week, there were just 13 high-definition programs available from Comcast, out of more than 230 total. The on-demand service had a smattering of additional high-definition shows and movies.

And standard TV shows on a high-definition set can look awful. They can be fuzzy. They also typically fill only a portion of the wide screen, with big black or gray bands on the sides. You can eliminate the bands using TV features that stretch or zoom the picture, but these modes either cut off too much or distort people so they look unnaturally short and stout.

Also, we ran into plenty of extra costs and hassles. We had to buy new furniture to hold the TV and all the gadgets that attached to it. We had to replace our DirecTV satellite service with Comcast cable, because the trees in our yard blocked the high-definition satellite signal — which is beamed separately from another position in the sky. The Comcast digital service with high-definition costs more than the company’s standard cable service and its DVR holds only 15 hours of high-definition programming versus 60 hours of standard programming.

Despite all these costs and limitations, we were won over by our HDTV test. After returning the test unit, we went out and bought our own HDTV. We decided that in the slow transition to high-definition programming, there’s now enough content to make HDTV worthwhile. And once you get used to high definition, it’s tough to go back to plain old TV.

Email me at mossberg@wsj.com.

Unfortunately, shopping for a television set is much, much harder than it used to be. The TV aisles in your local electronics store are like exotic galleries packed with confusing acronyms — LCD, HDTV, DLP — and staffed by clerks who often are either clueless, or so geeky, that they can’t help much. This is not a great situation when you’re spending thousands of dollars on a TV, not the hundreds people used to spend.

So, here’s a rough, quick guide to buying a television this holiday season. Our aim is to provide a very basic cheat sheet so you can at least wade through the basics and talk to the salespeople intelligently. For greater detail, we suggest buying one of those glossy magazines that covers new TVs in depth. Even if you don’t actually purchase the set at a store and instead opt to buy it online, we suggest visiting the store to see the TV so that you can judge its performance in person.

There are two basic types of big-screen TVs — flat panels, where much of the technology that creates the image is actually embedded in the glass screen itself; and projection sets, also called microdisplay sets, where the front screen is just a sheet of plastic and the key technology that creates the image is in the back of the set.

42″ Samsung HP-R4252 Plasma TV. Price: $3,499.99. For more info: www.samsung.com.

Within these two broad categories, competing technologies are slugging it out. There are two main types of flat-panel sets — LCD and plasma — and three main types of projection sets. Most new TVs are “digital,” meaning they can deal directly with the computerlike signals produced by newer TV transmissions. Older sets are considered “analog,” and were designed for older TV transmissions. Digital sets can display analog TV signals, but not always very well. All U.S. TV transmissions are due to convert to digital signals in the next few years.

HDTV versus ED and SD

Many big-screen TVs are capable of receiving high-definition television signals, or HDTV — the most detailed, and best-looking, television available. But some cheaper digital models can only display lesser-quality pictures called Enhanced Definition, or ED. Others are stuck at standard definition, or SD, which is even worse.

So, just because you have a big-screen, digital TV, that doesn’t mean it’s an HDTV. Make sure any set you choose can handle HD signals. Also, many HD sets don’t actually contain an HD receiver, or tuner — the component that actually pulls in the HD programming. They are merely “HD-ready,” meaning they can display HDTV if you connect them to an HD receiver, like a cable or satellite set-top box that is able to receive HD signals. Others have an HD receiver built in, though it’s usually limited to over-the-air HD broadcasts, which require an antenna, and can’t pick up cable or satellite transmissions.

Flat Panel Screens — LCD and Plasma

LCD (Liquid Crystal Display) and plasma screens allow for large TVs that are very thin. If aesthetics are your biggest concern and you’re interested in buying a TV that can be attached to a wall, you should buy one of these two types of screens. They also offer some of the best-quality pictures available.

The actual technology in these two screens is quite different. LCD TVs are like the screens on laptops or flat-panel computer monitors. They work by passing current through tiny liquid crystals. Plasma TVs work by stimulating a captive gas with an electrical charge.

45″ Sharp AQUOS LCD TV, LC-GD7U. Price: $5,499.99. For more info: www.sharpusa.com

Both technologies are rapidly becoming cheaper, but they are still mainly distinguished by how much they cost at certain sizes. LCD TVs are a bit thinner and much lighter than plasmas, but, at large-screen sizes, they are prohibitively expensive. By contrast, plasmas aren’t efficient to make at small-screen sizes.

So, for people with typical budgets this holiday season, the only affordable flat-panel TVs today more than 40 inches in size will almost certainly be plasmas. Buyers of flat-panel TVs under 40 inches will very likely wind up with an LCD.

In general, both technologies deliver vivid, intense pictures. There are differences, but these have been narrowing, as the competition drives improvements in both camps. For instance, plasmas were long superior in viewing angle — the ability to see the picture well from the side — but some LCDs have caught up and even passed plasmas on this score.

Early plasmas had a risk of “burn-in,” a situation where a logo or fixed text might remain visible even after you change channels. But this has been almost eliminated in new sets. Early LCDs showed ghosting during fast-action shots, but, again, this has been greatly eased in newer sets.

TV geeks will see differences among the two technologies in areas such as contrast, color saturation and brightness. But these things vary among manufacturers and models, and most viewers won’t notice fine distinctions. The best way to choose is to go to a store and compare with your own eyes, without worrying about techie jargon.

These two types of TVs will definitely set you back; LCDs come in prices ranging from $450 for 13 inches to $5,500 for 46-inchers to $21,000 for a 65-inch set. Plasmas go for about $2,200 for a 42-inch set and $12,000 for a 63-inch plasma screen. Yes, we’re still just talking about televisions here.

Projection TVs

If you’re shocked by the prices of the LCD and plasma sets, you might find projection televisions a little more your speed. They tend to cost less than the flat-panel models, but still deliver a handsome picture.

These sets aren’t nearly as thin as the flat panels, because they need depth internally to project the image they create in the back of the set. But if you don’t mind sacrificing aesthetics, you’ll find some good options in this grouping.

Projection TVs can be divided into three main categories: CRT (cathode ray tube) rear projection; LCD rear projection; and DLP (Digital Light Projection) rear projection. The first two are also called “microdisplays,” because they use tiny display chips to create the image in the rear of the set.

50″ Samsung HL-R5087W DLP Rear Projection TV. Price: $3,699.99. For more info: www.samsung.com.

CRT sets use the oldest and least advanced of the projection technologies, though they still offer good color and sharp pictures. Their screens range from about 42 to 65 inches, but their cabinets are notably deeper than the other types of projection sets, taking up a lot of space. They are, however, the least expensive of the projection TVs, costing about $1,800 for a 51-inch CRT.

LCD rear projection uses a rather slim cabinet; for example, a 55-inch screen only has a 20-inch deep cabinet. They range in size from about 42 to 62 inches. These sets use tiny LCD screens and project the picture they create onto the large, front screen. A 55-inch LCD rear-projection set will run you about $3,000.

DLP rear projection comes in screens measuring 42 inches and up while still boasting relatively shallow cabinet sizes. For example, a 61-inch DLP can have a cabinet of 19 inches. This technology uses a chip packed with tiny mirrors to create and project a TV picture. It generally costs more than a CRT, but is still less expensive than a plasma or flat-panel LCD TV. The images produced on a DLP are noted for their sharp blacks and grayscales. We found a 50-inch DLP for $2,200.

More Confusion

Like computers and cellphones, digital TVs are improving rapidly, so that a cheap model on sale may use last year’s technology. Also, some regular old analog TV sets are being touted as “flat screen,” because they use a flat piece of glass to encase old technology. But they are not “flat-panel.”

The connectors on all these TVs can be horribly confusing. But you may want to get two new types of connectors — HDMI, which supposedly simplifies connecting components without any loss of quality; and CableCard, which allows you to get some, but not all, cable networks without a bulky set-top box.

Our best advice is to shop around, and to buy the set that matches your budget and looks good to you in the store. All the jargon and expert opinions in the world matter less than your own taste.

• Email: MossbergSolution@wsj.com

If you have a question, send it to me at mossberg@wsj.com, and I may select it to be answered here in Mossberg’s Mailbox.

You recently recommended antispyware programs for Windows users. Do Apple Macintosh users need such software, and, if so, what products clean up spyware on the Mac?

There’s little or no reported spyware for Apple’s Mac OS X operating system. So the spyware problem isn’t much of a headache for Mac users, and consequently, there isn’t much of a market for Mac antispyware software.

Most spyware and adware consists of malicious programs, and, like regular programs, these harmful applications have to be written to run on a particular operating system. All the spyware programs I have seen, or heard about, are written to run on Windows, which is on the vast majority of the world’s PCs, and is also easier for spyware programs to penetrate than the Mac operating system is. Because they are Windows programs, they simply won’t run on the Mac, even if Mac users accidentally download them.

One type of spyware, called tracking cookies, doesn’t take the form of an actual program, and can be used on Macs. There are a few antispyware and cookie-control utilities for the Mac that may be effective against these tracking cookies, such as Internet Cleanup from Allume Software (www.allume.com). But, unlike their Windows counterparts, I haven’t tested any of them, and can’t say how well they work.

Mac users who run Apple’s built-in Safari Web browser can stop most tracking cookies by going to the Security portion of the Preferences panel and selecting the option to accept only cookies placed by the site they are using, which eliminates cookies placed by third-party advertising companies. A similar option is available in the Firefox Web browser, on both Mac and Windows. On the Mac, it’s in Firefox’s Preferences panel, under Privacy.

I’m at a loss as to where to find blogs on the Web. Are there blog search engines that help compile and categorize blogs for public perusal?

Yes. You can search or browse Web logs, or blogs, at several sites such as Feedster (feedster.com), Bloglines (bloglines.com) and Technorati (technorati.com).

You can also install special programs that let you find, and subscribe free of charge, to numerous blogs and other frequently updated Web sites. These include FeedDemon for Windows (feeddemon.com) and NetNewsWire on the Mac (ranchero.com/net newswire/).

With these programs, called news readers, you don’t usually see the blog in its original form, you receive “feeds” from them — constantly updated headlines and summaries of new entries. You can then read the entire item by just clicking on the headline.

I’ve been shopping for a TV that can receive broadcast high-definition signals, and notice many described as “HD-ready.” What does that mean?

To receive and display high-definition programming, a TV set needs two basic features. One is a display capable of rendering the high-definition picture. The other is a tuner, or receiver, capable of receiving the high-definition signal, either over the air, or from a cable or satellite service.

When a TV set is described as “HD-ready,” it usually means the set can display high-definition pictures, but lacks the special tuner needed to receive them. It may have no tuner at all built in, or it may have just a standard tuner. With this type of TV, you must buy a separate high-definition over-the-air tuner, or obtain a high-definition cable or satellite receiver, to get high-definition programming.

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Because of the volume of e-mail I receive, I can’t routinely answer individual questions by e-mail, or consult on individual problems or purchasing decisions. I read all questions I receive and select three each week to answer in the column.

Write to Walter S. Mossberg at mossberg@wsj.com