In my view, the problem is actually that theaters often do not have equivalent quality for 3D and non-3D. The biggest, best screen may show 3D IMAX all day long

In my view, the problem is actually that theaters often do not have equivalent quality for 3D and non-3D. The biggest, best screen may show 3D IMAX all day long, because that's what is most profitable. Seeing movies in 2D on the highest quality screen/projection/sound has been fairly difficult in the last year or more.