NJ5, no matter how precise it is, they won't be able to do away with using the sensor bar because the rotational direction (around the vertical axis) needs to be calibrated by pointing at something.
Up-and-down is OK because gravity does the trick, but side-to-side and round-and-round needs a reference point at least once, and if you were to solely rely on the gamer doing what he's told you'd get a lot of people complaining the control scheme was broken.







