The "failure" of motion controls is determined by publishers, not by the system itself. Sure there is still a lot to work to do, but I can see the potential in games like Metroid Prime 3 or Red Steel 2, also Resident Evil 4: Wii edition plays much better than the original, the pointer is a great thing for sure. Before making I final judgment I'll wait for Skyward Sword, it's sad to say but after many years that's the 1st mainstream game, made by top-level developer fo fully utilize motion controls. Also it's a bit early to judge Move and Kinect, so far we have only seen launch games, how often you see high-quality software on launch aside from ports?
Personally I don't see the potential of kinect (but who knows?), about Move, so far it's been bad, but I think we will change our ideas when we'll see games like Killzone3 of DeadSpace 2 adopting it.
