To summarize:
IMAX is pretty much the movie experience on steroids. Huge screens with clearer than clear picture (the stadium near me really is eight stories high with crystal clear quality). The picture quality is so high that most IMAX movies are shot with special lens cameras on special film.
Not only do IMAX theaters come with surround sound unlike any other movie theater, but the screens themselves have perforations for audio, so they can have certain sounds come from certain sections of the screen. When someone on screen speaks, it often sounds like it's coming straight from their mouth. Off screen sounds sound like their coming from just off screen. Etc., etc.
