last year I put in my bedroom a jvc dla x7 3d hd projector, a 100" screen innovations screen, a pioneer elite receiver, and in wall speakers with a definitive subwoofer. This is my third setup since 1999.
the screen innovations screen really makes the picture truly awesome. I tried it on a wall at first and the picture was very good, but with the screen the picture is insane. It is grey so it enhances the black and contrast levels so it looks as good as an lcd. I haven't even tried the 3d function, and I probably never will. In a few years I'll get a 4k jvc projector. Saw them at ces, they are ridiculous.
4k is 4x the resolution of hd.