I just don't see the point of integration with games at all. In competitive and power gaming, Efficiency is key. The amount of inputs per second are vital, RTS, VS Fighting Games, Driving Games, RPGs ( Hack & Slash ), Action Games are all extremely dependent on how fast and accurately you can input commands. Motion Gaming will always add a degree of input lag and extra exertion.
Motion Gaming is for kids and casual gamers. If you'd rather play a game with the motion controller over a conventional controller. You are an idiot.