ambient light will always be an issue. Most people end up going with a higher gain screen like a dalite HP 2.4 gain screen.
The question that I have is, are they using a special screen material for this projector. I know the Dolby 3D system does not need a special screen. The filters use a light wavelengh.
That actually would be really neat if RED could set 1 of the RGB lasers to a specific wavelengh and the other to a diffrent wavelengh, with out using filters in the projector. Then you only need the glasses. This would really help with Light loss for 3D.
So many possibilities.