I saw The Hobbit in 48fps and 3D and didn't like either of those formats.
The 48fps looked like a TV production in the scenes where there were real sets (Bilbo's home) and only looked okay where there was CGI/greenscreen (like Rivendell).
And the 3D was too subtle, just like it is in so many films now. Even in Prometheus and Life of Pi, it's subtle 3D and half the time it looks just the same if you lift up the 3D glasses.
Why don't they use the immersive 3D like they did with Avatar? It's like the 3D they use now goes backwards from the screen, rather than forwards into the audience. I want things to come out of the screen at me! That's what i'm paying for! I remember seeing Avatar and there was a little kid next to me who was swatting at the air when those glowing blue floating creatures were in the jungle at night, as though they were right in front of us. You don't get that any more with 3D. It's a big con and cop-out.