http://www.thewrap.com/imax-moving-a...ng-preference/
So it sounds like a significant player in overall revenue stream for 3D ticket sales wants to move away from 3D.
For me, it's not that people are necessarily showing a preference for 3D, just that there isn't the content. There hasn't been a critically acclaimed, 'made for 3D' movie that's penetrated into the non-3D going market (80% of ticket sales were 3D) since Gravity, coming up to 4 years ago.