Hi Def Tv's

I have a 1080p 50" Plasma that I bought for under $1000, when I could have bought a 720p 50" for $699 at the time. I'm glad I bought the 1080p because I love watching Bluray movies now, I think there is a big difference between DVD and Bluray. I won't buy a DVD now if it's available in Bluray no matter the cost. Use HDMI cables or at the very least "component cables" to get the best picture. They are dirt cheap on Ebay.
Remember, the bigger the TV, the more you NEED better resolution. But if you have no interest in Bluray or Xbox/PS3 then 720p is all you need, I think by the time they broadcast in 1080p your current TV will probably need replacing.