Superbly derivative. Which is to say, utterly pointless compared to the more interesting, and, crucially, different tech of Natal.
PS Move is a straight rip of the Wii Remote + Nunchuk, except the Nunchuk equivalent is wireless and doesn't have a motion sensor. And instead of infra red it uses the PSEye to track a coloured ball (someone please explain why this isn't in fact a backwards step - a more expensive, less reliable tracking system?).
Hopeless. Hopefully PS3 owners are not dopey enough to have avoided the Wii completely if they had any interest in motion controlled games, and would have no particular interest in this 'upgrade'. The total lack of innovation deserves nothing more than total apathy.