I believe Joe wasn't clear about what kind of 3D he meant. Anyhow, I've only seen one 3D flash game and it was in painful anaglyph. Why make a category when there are no games to put in it?
Yes I think that we should wait to have a few games before making a section but about the glasses here in Italy many cinemas give you a pair of glasses for a small raise on the ticket price and you can use them every time you want.
I could see the day come very soon where we'll be shooting down zombies by having the option to either move the board around, like you can with on-line chess or zoom-in and do a 360-degree spin to see if a zombie's sneekin' up on 'ya.