Unless you've been living down a hobbit hole, or care nothing about movies and technology (in which case, how did you get here?) you've heard about The Hobbit and it's magical new "High Frame Rate": 48fps. This doubling of the traditional movie framerate has gotten much hoopla, with director Peter Jackson claiming it's the best way to see his new film.
So with an open mind, and a slightly emptier wallet, I saw The Hobbit in IMAX HFR 3D, and then a few days later, in "regular" 24fps RealD with Dolby Atmos. The difference was not subtle.