The medium is still the same. All they're doing is rendering each frame twice with the virtual camera positions offset horizontally (like our eyes). But no one has figured out how to display the result without you having to wear something on your face. The best method I know of involves 2 projectors somehow polarized differently, with polarized lenses on the viewer's eyes to match. I read that this movie uses a different process, with a single projector. If it's done by screwing with the colors, then frankly I'd prefer the standard 2D projection.
Scott, I haven't seen this yet, so I don't know firsthand about swords shoved in your face. I only read that they had steered clear of such gimmicks. Was there a lot of this kind of thing? One specific thing I remember reading was that they wanted the screen to be like a window, and not a door for stuff to come out and fly in your face.