CNN reported last week (I wish I could find the article now) that Plasma's cannot resolute 1080p on a screen smaller than 50inches unlike LCD TV's.
They mentioned this fact due to LCD's taking over the 40" market and pushing prices of plasmas down.
So if you're in the market for a flat-screen with true 1080p... go w/ LCD.
This one tip will help you sleep better tonight
A few seconds are all you need to get a better night's rest.