Gravity. Went to the late screening at the Imax. Frankly, this movie completely blew me away. The general concept is very lean (it's essentially an escape movie, practically done Blockbuster Action style), but it always stays exciting and keeps you on the end of your seat. The characters are simple yet solid, and the use of the sound (mostly in the great crescendos and sudden silences) really suck you in. Those visuals, though... utterly breathtaking. The vast beauty of space/Earth and the total horror of the scenario combine into something truly sublime.
It's a grand, special sort of movie. I recommend it to pretty much everyone, preferably on the biggest screen you can find. The 3D did nothing for me, but then, it never does (I'm told by people it does work for that it is worth seeing like that, however).