GameSpy reports: "Game interfaces often get the shaft. Developers invest tons in graphics or sound or physics, but nobody ever invests tons of time into the control scheme. ... And after a couple decades of stagnation (game pads are basically the same as they were for the NES, save for more buttons) we're finally on the verge of some crazy new technologies for how people interact with games."
The article talks about next generation game controls, that can respond to your movement not just the pressing a button on a control pad. Yes, this type of technology has been around for years, but now it is more sophisticated.
I am pretty sure that this technology can take games to a whole new level of interaction that has been available in the past.