I found out a couple of people live close to me lol, never happened before. XD Most people on the site I told you about, they used to be on Crysandrea too. I quit before the site went down, so it wasn't a big issue for me, I still chat here and there with the creator of the site though.
I don't know that making it more game-like would really help for me, honestly. It might? But ultimately, it'd still be exercising. I dunno. Hard to say. I know that I'm not really big on the dance games for some reason, though I do have some and have played them.
Either way, as the technology becomes available, it certainly will happen... And it should be reasonably safe, as long as things to look at are kept to a minimum. Have you heard of "Zombies! Run!"? That's an AR fitness game, though the AR part is mostly auditory.