GamePro: "There's no reason to think the next Wii won't feature motion control. Plus, the Wii MotionPlus adapter, though largely unsupported, showed that they're interested in making motion control more accurate and realistic.
The PlayStation Move controller was a half-step ahead of that, using the help of the PlayStation Eye camera to offer enhanced precision. It wouldn't be a surprise to see Nintendo use that kind of setup rather than the Kinect's controller-less method, though they probably wouldn't use a goofy glowing ball. Alternately, the controller itself could have a camera that would display its view on your TV in order to use AR-based games like the 3DS."