It clearly uses the motion+ 3D movement sensing/HD rumble features, camera features etc.
It looks like there's plenty of mini games (there seems a huge amount just shown, probably many more, each with slight variations on control and reflex challenges), but essentially it looks like some sort of duelling game (rock/paper/scissors is mentioned as being able to be sensed by the controller, too). Dispute/argument settler? It's meant as a simple party game and for just people wanting a quick laugh. I see it becoming a popular drinking game. While not a "gamer's game" I can see this becoming some humongous fad. You wait and see.
Wouldn't surprise me if there's Wario Ware style single player, too.