"As high-definition television programming finally approaches critical mass and the prices of everything from smaller CRTs to big plasma displays continue to fall, millions of Americans are considering making the upgrade to HD's sharp, luscious picture and movie-quality sound. But if you visit your local consumer electronics store without doing a little research first, you may leave with more questions than you had when you went in. At the very least, you should know what HD programming you'll be able to get in your area, what equipment you'll need to get it, and whether you'll have to make compromises with your new set that you don't with your analog TV. Here's a good start on that research..."
I'm still reading through this article myself, but it's a great source of information for those of us (myself included) who are still learning about HDTV. Worth a read!