Over Christmas we had the family over, and we watched a couple of movies on my Benq 6200 projector on a screen measuring about 87" on the diagonal. The first movie (their request, not mine) was "Love Actually", and the second was "The Day After Tomorrow". The age of the audience ranged from 26 to 76, seven people in total. I didn't mention the rainbow effect, or potential eye-strain - we just watched the movie. Everyone enjoyed it. Nobody mentioned rainbow effects. Nobody complained of eye-strain, or dizziness or headaches. I sometimes wonder if we don't all hype ourselves so much into the advantages/disadvantages of our technology, that we have become incapable of properly enjoying it ?