Just to add some counterpoint--I know a lot of people are saying that you 'must' see Gravity in 3D, and while I haven't seen it in 3D, I can say that I still think it's one of the best films of the year, even in its boring, 2D state. I don't really think 3D adds anything necessary to a film--maybe it adds to the gee-whiz factor, sure, but I still think 3D is more of a novelty than it is a legitimate way to enrich a film-going experience. Not to mention I often just find it distracting (wearing two pairs of glasses at the same time sucks) and ugly looking--you'd better believe I'll be watching the next Hobbit film in good old 2D, after enduring the first one in 3D last year. (And don't even get me started on The Hobbit's higher frame rate...)
So if you're not much of a 3D fan yourself, save yourself some bucks, get the cheaper tickets, and still enjoy a hell of a show. Just my two cents. ^^
I get that point completely. This film has really stuck with me, that is always a good thing for me. At the water cooler a discussion ensued over fluff (Armageddon) vs. more serious films. There is a level of symbolism that I didn't catch until a day or two after the movie. The movie's title says it all. It is easy to get caught up in the action, and miss the bigger picture.
At IMAX a 3D effect is not that strong. In small cinema halls 3D makes kind of a tunnel effect which is a bit straining on eyes but at IMAX it is more natural and you can appreciate panoramic view which is essential for such films like Gravity.
I think the massive screen and upgrade in sound makes a film like this come to life. I would rather watch 3D at home on a more detailed screen and better 3D glasses than deal with a small movie theater, oh and sometimes those sound systems stink.