Image Source: hayesmates.co.ukNintendo Patents Possible Revolution Controller Technology By: Richard AllenAccording to the United States Patent and Trademark Office, on June 21, 2005 Nintendo has been awarded a patent on some new game system technologies. Here is some of the information avaiable through their website.
"Game system with tilt sensor and game program including viewpoint direction changing feature
Abstract
A game system displaying a three-dimensional game space on a display includes a housing held by a player, a tilt sensor provided on the housing, a viewpoint coordinates determination mechanism for determining viewpoint coordinates in accordance with an output value of the tilt sensor, and a game image generation processing mechanism for generating a game image based on the viewpoint coordinates determined by the viewpoint coordinates determination mechanism. The game system allows the player to feel as if the three-dimensional game space is tilted in accordance with a tilt of a game device, etc., with a minimal processing burden. "
The patent application was filed for in May 19th 2003, so it looks like the original target for this techonology was the GameCube. I would imagine this would be a canidate for the Revolution.Related Links:United States Patent: 6,908,388Have Nintendo Patented the Revolution controller?