Playstation Move
I can't say that I'm much of a gamer. I've got a PS3 but it largely serves as a media player whether we're speaking of Blu-ray, DVDs, or network video (including Netflix). However, since at the time of purchase it'd been a bit of a toss-up between a PS3 and a Wii, I decided to grab Playstation Move, the motion controller platform recently released for the PS3.
I'm happy that it's not the exclusive controller for the PS3, as motion control can be overused, but it seems to make a decent controller for certain games. Reviews suggest that it's motion tracking is better than the Wii's, but that's not too surprising given that it dates from a few years later, on a more powerful platform, and also uses a controller + webcam approach to motion tracking. Still, when playing table tennis ping pong, there were a few motions that the controller can't seem to accurately pick up on.
As well, the Move has a pretty lousy selection of games at the moment with little available beyond the starter sports package. A controller like the Move's seems to demand a Star Wars games, although so far I haven't seen plans announced for any. Thus far, the coolest sounding game that I've seen announced is Sorcery, even though it's not scheduled to release for a while yet:
Perhaps support for the Move will also be patched into some existing games. However, Sony appears to be gradually shifting away from a free Playstation Network, to one favouring paid memberships, so I'm not sure when I'd expect to see a lot of these patches available without forking out some extra amount of cash.