What you are pointing out changes nothing about what I said. If you look at the landscape now (it doesn't matter how it got there which you seemed to be focusing on), motions controls are not the primary focus of any of the three platforms we have. They've become secondary or absent (in the case of Xbox.)
As for Sony and motion controls, well, they were experimenting with that on their own, even before the Wii released. They just didn't have the foresight to make it the default for their next console that Nintendo had with the Wii. It was more of a side project for them that they dabbled with, with the EyeToy. I saw a behind the scenes video that showed the guy working on EyeToy playing with a controller that somewhat resembled what we got with the move but again, not the point I was making!