Casual are happy with their wii and kinect 1 and majority of them will not buy a wii u or xboxone for kinect 2

It might not even happen. If it does, then not Sony.

I don't believe MS or Sony possess the abliity to create something on both the level of quality and success that Wii Sports had. So it'll either be Nintendo again, assuming they get their heads out of their asses, or some third party/ indie dev that comes out of nowhere similar to Notch.

Nothing will bring back the WII audience this generation. With the WII U fated to be a sinking ship nintendo will have to change in the future in order for this to happen. Microsoft will continue to fail to draw in that same crowd because the software for the last iteration of kinect was trash. We all know about sony's history so I guess we don't need to bring up that possibility.