^ I think it's the Sega Activator.
It was kind of a strange precursor to the Kinect. On paper, you could punch or kick and your character would do the same on the screen. In reality, each sector of the Activator corresponded to a direction on a controller . . . so you would have to twist and turn all over the place to play games. And you had to calibrate it every time. And you couldn't use it in a room with high ceilings or with ceiling fans.
Or how about R.O.B.?
He was supposed to help you play games and keep score by moving little red and blue discs. In reality, it just slowed you down.
Or how about . . . gaming chairs? For when a Lay-Z Boy just won't cut it.
My brother got one of the POS's for Christmas when he was 10. It broke within 30 minutes. He was heartbroken.