This year's E3 saw both Sony and Microsoft unveil new motion sensing gaming technology set to rival the Nintendo Wii. While interesting, that doesn't seem to have much to do with movies. However, there's one piece of software on display that could shoot to the top of every movie-loving gamer's holiday wishlist: Yoostar 2 -- a title being billed as the first "movie karaoke" game. So, what is movie karaoke?