I'd definitely check out The Hobbit in 2D as long as it was the 48 fps version.
Not a fan of 3D... even the natively shot Hugo had many children's pop-up book looking scenes that took me out of the movie, and I also don't like the other annoying visual artifacts associated with today's 3D technology.
Do we know for a fact that all D-Cinema versions (whether 2D or 3D) will be 48 fps?
I'm willing to give higher frame rates a chance. It could give you a "wow" experience without having to deal with 3D glasses. I remember seeing Oklahoma's Todd-AO 30 fps version on home video and thought it was an improvement. 48 fps and 60 fps have a lot of potential.