3D is more of a fad than moving pictures. I think both are a flash in the pan. Heck, you exchange your imagination for a visual effect some profit hungry guy decides on. For my, it is still old time radio for my entertainment. I can think, be challenged, be entertained, not get headaches and save the big bucks.
I think holographic projection is the real wave of advancement. The basics have been around for some years but the technology is still too crude to make the impact. When it gets there, we can just buy holosuites instead of home theaters. Add AI and we can step into the production. Okay Scottie, one to beam up.