Microsoft unwittingly convinces people to develop for PS4 Eye

I've been watching around the web deciding which console to buy and this post isn't going to be about that (and I'm not telling you either way incase a fanboi flame war erupts in the comments)

Say there is a game on Xbox One that has motion in it (there will be at least a few due to the packaged Kinect) and considering that both consoles share the same architecture, etc. (basically the same PCs) would it not be easy after putting motion in the Xbox One game to port it to PS4's motion system and sell it again? This would in turn convince people to buy the eye, etc. etc.