3D in movies is also primitive.
One of the characteristics of 3D is the concept of a focal plane. You focus on an object, the foreground and the background go fuzzy and are slightly doubled, and that's what your brain expects. Your eyes move from object to object, refocusing as needed depending upon its distance.
However, with current 3D technologies, you can't do that. The focal plane is what the director and editors decide it is, for the duration of that scene. Your eyes CAN'T move from object to object and refocus; you can't glance around the scene to look at interesting parts of the setting and get a proper sense of depth. In essence, the director has decided where in the scene you get to have a proper 3D experience, and your eyes can't engage in a natural scanning behavior.
The alternative is to render 3D objects so they are all in the same focal plane. You can then look at whatever you want and get the 3D depth-effect, but it won't look right because you don't get that foreground/background blurring; everything is always in sharp focus. The object you're looking at is in 3D, but the overall scene lacks depth.
3D video is a long, long way from properly simulating real 3D environments.