In terms of bleeding edge technology, Samsung has 40, 46 & 52 inch LCDs that have:
LED light source - bulbs last many years (most LCDs use bulbs that must be replaced every 2-3 years and cost hundreds).
These Samsung sets actually dim the LEDs by zone depending on which part of the movie picture needs it.
A current review (The PerfectVision, December) says this process is promising but needs a little work (bleeding edge, remember?).
The blacks are actually TOO black and obscure gray shading thus robbing detail.
25,000:1 contrast ratio (most sets are lucky if the have 10,000:1),
120 hz refresh rate - stops sports scenes from disintegrating if the action gets too fast,
1.3 HDMI - most sets now have this but it's still worth mentioning. 1.3 allows "Deep Color" for more faithful color rendering (assuming your DVD player has 1.3).