[Al Skierkiewicz]

I don't think that would work very well as the cross talk between two screens would be evident. Combining computer generated graphics with polarization generated electronically is also a big stumbling block. I have not heard of anyone performing electronic polarization although it might be possible. A cheaper alternative at the moment would be two sets of goggles. If the individuals are playing the same game, you could conceivably display a background on a common display while feeding separate overlays to the individual goggles.