Re: Not entirely new

"Gyration were doing something like this a year or more ago - definitely pre-Wii"

Pre-PC, even - the old farts amongst us (myself included ;-) ) may be able to cast their minds back to the mid-80s when some company released a joystick which used mercury tilt-switches rather than the more usual microswitches or leaf-spring contacts (can't for the life of me remember the company though - can anyone remember?)

Needless to say, the product bombed and you sure as hell couldn't play 'Daley Thompson's Decathlon' with :-)