I don't think this matters too much. Microsoft and Sony aren't going to copy the idea unless they understand and believe it is the next step in gaming evolution. This controller is not market tested yet, and until Microsoft or Sony know for a fact that the controller will sell and do well in all markets they won't copy the device.
However, wait and see. If Nintendo's controller is a huge hit then both Sony and Microsoft will copy it. But by then it will be too late. Nintendo will be on 2nd or 3rd generation software with the controller and they will be on 1st.