Ive got a small hd lcd... my ma has a projection ,, and my brother has i think its called dlp.. its about 1200 for 50 inches, with a stand. His is nicer then the hd lcd. I wouldnt buy another projection one (old school projection sets).
If your budjet is from 5,000 up ,, think about getting a projector. Great ones go for about 8999 and up. But with 2-5 grand you can turn your wall into a nice tv.
Something tells me the new development will be a film you put over windows , that when lights on it ,its not clear, but when its off ,, its clear as glass. It must have to do with projectors because the guy advised a projector.