Fifty years from now I don't think optical realism is going to be an issue in visual communication any more. Experience is so much richer than light falling on your retina. You embody a microcosm of reality when you walk down the street - your memories, your varying degrees of awareness of what's going on around you, everything we could call the contextualizing information. Representing that information is going to be the main issue in the years ahead - how the world meets the mind, not the eye.