Biggest problem is that the monitor is moving with the motion, but the action on the monitor is moving as well. If the rig banks you 15 degrees the monitor's still at 15 degrees relative to the player.
Also, he's only got 1 joystick, no room for throttles, buttons, nothing nada zip. Rather cramped and noisy rig, IMO.
Innovative? Hell yes!
My taste? No.