Not really a tv but:
“With the X2VGA+ and a standard VGA monitor, users can play their favorite Xbox games at 480p, 720p, or 1080i resolutions - over double that of standard TV”
Never tried it yet but if i got it, i would try it on a projector and have my wall and my screen while playing Fable.  Maybe look up at the sky during night time as my wallpaper for my wall.
http://www.x2vga.com/
What do you think?