A 1920x1080 native projector will roughly cost you your house, plus or minus a few children. But most native 1080x720 can still display 1920x1080 max.
Edit: I should contribute something useful I think, and so I will say that seeing the rainbow when you stare *into* the projector may be simply because the "density" (for lack of a better word) of the light is much greater than that reflected off the screen. I would have to think about it more to express myself better here, but maybe that makes sense.
Last edited by ringmir; 04/07/05 07:43 PM.