I was at a Sony store and they had an OLED TV on display...Amazing! It was like 10 pieces of printer paper thick. Crystal clear picture (it was in 1080p HD), way too small for gaming (It might be good for Pong), but it would definitely look nice on my desk.
From just looking at it...I would buy it for $500 (if I had any money to begin with), but it's not worth much more than that, for the simple reason it isn't practical because you can't see it from across the room.
I'll stick with my 60" plasma HDTV for now.