Not sure if anyone's addressed the TV options yet, but just in case it hasn't been mentioned:

No light control in your room: LCD

A very good amount of light control: Pioneer Kuro (no, not just plasma, get a Kuro)

Complete light control: front projection (though obviously this requires a lot more than just controlling the light to set up)

That's how I'm treating my future TV purchases. At the moment I can't really get my TV room dark at all during the day, so I have LCD. If I ever had a basement with no windows, I'd be awfully tempted to put a front projection system in there.