Elmer, speaking as a TV card user...
(and a Radeon 9700 AIW Pro, at that), I wouldn't want to have to turn off all the lights, have a special screen, buy a $1000 projector (at least - those are the cheap ones now), and replacement bulbs.
really - what if I want to watch the tube and it's daytime? I wouldn't want to watch bleached out colors.
yet I am a big fan of TV cards, and am watching right now in my see-through (thru-view is the registered name) desktop on my machine while I'm typing (Conan is on).
neye