I just got back from seeing The Hobbit in 3D IMAX today (unfortunately in 24 fps, which made for some ugly, blurry pans of the countryside). I can confirm that I have zero enthusiasm for this "trend." I would pay premium prices for a 70mm class, true THX theatre experience, but stereoscopy adds little to my experience, and creates too many problems. Going from silent to talkies it ain't.
The only thing I ever saw that really worked was the Tron sequel. A bad movie, but it had some very nice computer generated 3D sequences. But not while you can see the actors. That's the real problem. For me, people as stereoscopic subjects enter that uncanny valley where something tiny isn't right, all the time, and it activates a sense of revulsion, distraction, and displeasure. Multiple people create problems because if you turn your head even slightly during the scene, the fact that you are watching stereoscopy and not a true 3D scene becomes immediately apparent. It gets worse rather than better on the bigger screens, because you're more likely to need head movement. I understand fully CG animation does very well, but that's for my kids, not me. It makes sense, as animated characters are a major discrepancy from real images, not the tiny and unsettling sort.
The motorized Lazy-boy seats my local theatre just put in add more to the experience than stereoscopy ever has. So I am a dissatisfied customer, and I won't pay a thin dime more for any "3D," and am now actively seeking 2D presentations.
My open mind is now closed for business on the subject. It's been a disappointment. If I were to suggest a good place for a new trend to make theatres worth the trip, it would be wiring all the seats with a speaker array and using that to generate truly spatial and also asymmetrical (crowd noise, ambient) sound effects.