Features:

Look for TVs with slots for digital camera media cards, usb connections, other unique features include
LG's plasma TV with built in DVR, and Philips' "Ambilight" that projects a colored light behind the TV to enhance the mood and ease the eye strain of watching TV in a darkened room.

On Plasma screens, be sure there is some kind of burn-in reduction with orbiting pixels or other technology, particularly if you play video games, leave DVD menus onscreen, pause your DVD for long periods of time, or watch a channel with a permanent 'ticker' like a stock channel.