I think you're being far too hard on him. He had seen the 3D fad come and go before. He had a set of standards and I think he was right to stand by them. As it is 3D adds almost nothing to film making at the moment: there are technological limitations and we don't have a good idea of how to use it. Right now it increases ticket prices, is usually 'shoveled-on' to a movie, and reduces the light hitting the viewer's eyes (a long-standing pet peeve of Ebert).
> We didn't evolve to blend a series of 30 static images per second into seamless motion, but we cope with that so well that no-one actually thinks about it.
There is a reason we don't see many fast pans in movies. 24fps forces some compromises. I have no doubt that 48 (or something higher) will eventually become the standard, but just like color/sound/3D we'll need to develop the techniques around it to use it properly.