Did you watch the video? If the game video is beamed to the TV, the iPad and even iPhone can be very competent controllers. Once you can use the gyroscope/acc

Did you watch the video? If the game video is beamed to the TV, the iPad and even iPhone can be very competent controllers. Once you can use the gyroscope/accelerometer freely and use the entire screen for gestures (without worrying you're obscuring the gameplay), they can make fantastic gamepads. Plus, since every kid is using their own device, everyone has instant access to their preferences.