With the XBOX you have people developing for 3 processors instead of one. And once you get multithreading going, it's diminishing costs to get 8 working if you can get 3 working.
I disagree. When I watched the Wii demo my eyes widened when I saw the the sword fighting demo with the person using the Wii.
People were playing Golf, Tennis, and Baseball in a way never done before on a video game console. If it's never been done before, wouldn't it be revolutionary?
Technology is actually being researched (and I've seen it in practice at my University) that lets me move a controller (that looks a bit like a pen), with the movements corresponding to a little ball in a VR world on a computer screen. The cool thing was that by bumping into objects (and the floor/walls/ceiling) I could actually feel the little ball bumping into the objects, and feel the resistance of moving those objects around, all in a 3D world. It's research applications include the possibilities of using it to help train surgeons so that they can practice surgery without needing a cadaver. Or to hook up a real surgeon perform a real, complex operation, and have the surgeon in training simply hold the pen and have it follow along with a sensor on the actual scalpel.
I think Nintendo's controller is just starting to scrape the surface of what can be done to change how games are controlled.
You'd be the first person I have ever seen not initially move the controller with them when playing a game console for the first time.