1) I'm almost more than positive that you will be able to. It's not a setting for the game or anything, it's only possible if you have a video card and cpu that can be pushed far enough, not a limitation of the game.
2) Can we play the game in 3D? You can play in 3D now, and with a regular monitor I play in stereoscopic 3D mode sometimes, and it can be a lot of fun. I think the last time I played like that was around easter....seeing the floating eggs in Uldah was pretty neat, and was crazy at how real they looked. Actually, it was amazing how EVERYTHING looked.
3) IMO, I think there will be a 60fps cap on game, like it is currently.