Not sure if I agree with 4k sales being lower than 3D, especially after the initial saturation period is over, and hardware prices drop to more "everyday consumer friendly" levels.
Keep in mind that 3D for some people is not an option because they are physically unable to enjoy it properly due to vision complications. Those same complications would not affect 4k playback. Granted this is probably a very small percentage, but a percentage nonetheless.
3D just never took off, in the US, like it did in other parts of the world.
As far as Disney and how the handle their home media, well IMO it's a mixed bag! Just look at the Captain America 2 release. The 3D version received a digital copy and slipcover(yes many people like and therefore purchase these), while the 2D version had neither. Then you get other releases that have no 3D at all, like this one.
I can't be certain, but I swear all these little cost cutting moves Disney has made seemed to happen right after they paid George Lucas the $4 Billion.

I guess what I considered the most reliable studio out there, just can't afford to be as reliable. Yes, kind of a bummer...but just another bummer in a long line of bummers, during a decades long passion of home video collecting.
