Actually, the newer projection systems (DLP, LCD) do a great job with blacks, even in brightly lit rooms. I have my Sony GWIII (3rd generation rear projection LCD) in a standard room and use it just fine, even in full daylight. GORGEOUS set. No, black levels aren't "perfect", but they're quite acceptable, and I don't have to subdue the room lighting to watch the set.
On a related note, there are two types of "LCD" TVs out there. There's direct-view LCD, which looks great but is only available in sizes up to about 30". There are also LCD projection TVs, which go up to 70" nowadays. I opted for a 50" set, and it's fabulous. It's projection, but this isn't your old heavy CRT-based projector -- 18" deep and 82 lbs.
Not that ANY of these options are really "travel technology"...
[This message has been edited by GregLeg (edited Dec 11, 2003).]