I'm blessed with a good quality projector projecting a huge arse screen on the wall. It's 5ft tall by 11ft wide and it has done some amazing things. It's an absolute riot to play games on especially with the surround sound going. I normally play SH4 or Need For Speed Pro Street on it and save my other games for my 19" LCD's. However I did play CoD4 on it just to see how intense the surround sound can get and it's downright creepy!
Gotta love projectors

Anyways I know how you feel it's a wonderfully awesome feeling! I cant wait for someone to make the ultimate Gaming Station for U-Boats (like they take real cockpits from airplanes for flight simulators). THat'd be NUTS.