Sony Move is new out on the market. It is essentially the PS3's answer to Nintendo Wii. It is an add-on to your PS3 to be able to play interactive games similar to the Wii. I really just wanted to post this funny commercial I saw for the Sony Move -- which really shows how intense the game play can get with the Sony Move.
I probably will not buy one as I don't own a PS3 and I haven't seen a need for purchasing yet. I do however think it would be a cool add-on if you do own a PS3, since the game play seems pretty cool and the initial extra pieces needed to play are reasonably priced for about $99, where you get a Move Motion Controller & "web-cam eye".