VB: On the Wii, the Wii MotionPlus technology will make aiming more accurate when it debuts next year. There are a lot of startups out there with technologies that promise to go much further. 3DV Systems has a depth camera where you wave your arms around and you don’t need a controller at all to control a game. Why didn’t Nintendo go further than it did?

RF-A: Wii MotionPlus is a great example of our approach to new technology. We were aware of that technology (the gryoscopic chips made by Invensense) at the time we designed the original Wii. But the cost would have been too high for the business model. It would have been unacceptable. By waiting about three years, the costs come down substantially and it becomes a viable product. So, for a number of the startups that you describe, there is very advanced technology. But it’s not at a point where there’s a consumer proposition.