Perhaps, but realistic scenes are bounded by the number of lights and triangles more than resolution. There are heuristics and approximations to get around this

Perhaps, but realistic scenes are bounded by the number of lights and triangles more than resolution. There are heuristics and approximations to get around this, but I think we will only be able to fake a subset of the human visual experience. Lots of smooth surfaces and simple lighting setups: think car shows and apartment renders, not nature. Realism can be extremely complex!