I'd be more interested in specific apps that could utilize optional hardware to give 3D. For example, you could have 3d glasses controlled via bluetooth... and an app that interlaces the left/right eye view in-sync with the glasses. It certainly wouldn't work well for every app, but could be really interesting for a subset of apps... and possibly for movies. Anyway, I think it'd be a cool option to have.
to those who think that 3d is going away... think again. Video hardware manufacturers need some new feature to differentiate themselves. For a while it was "HD", but that's about maxed-out, so the next step is 3d. Interfaces aren't super right now, but that'll get better with time. Once people are comfortable with 3d on their televisions, they'll be more comfortable using it on computer devices... iPad included.