Lifehacker has a great guide up today all about how to understand what all the numbers and letters surrounding HDTVs mean. 720p vs 1080i? LCD vs Plasma? What the heck is a contrast ratio? If you need guidance in the purchase of a new TV, this is a great place to start your research.
Check it out!
I will say that it's remarkable to me how easy the internet has made it to learn about subjects you never had a clue about before. Just over Thanksgiving, I set up my parents' surround sound system, upgrading them from technology that was over 15 years old. I did it all without really having to check anything online--I'd taught myself how to do it all when I installed my own system a couple of years ago.
Through the internet, I've become reasonably proficient at understanding how television antennas work, how to network just about anything, how to set up advanced remote control systems, how to bake anything you can think of--it's all right there, usually spelled out in so much detail that even a complete novice can get it all down pat, if he or she just takes the time to learn.
There's times when I'm just really happy to live in a day and place where things like this are possible.