So we own all 3 setups now.
WiiM+, Move, Kinect.
Initial impressions of Kinect with Kinect Sports is that there is a lot of noticeable delay, quality of play decreases with 2 player, it is not accurate enough to do quality throws in the Javelin and Discus events. In Table Tennis the game is no damn forgiving you'll never miss a shot. Navigating is slow and annoying, which is why they made Table Tennis so forgiving, cause its the same gameplay basically.
I'm probably gonna say this:
WiiM+ has the best pointer controls as long it doesn't go off screen.
Move has the deepest sports game, which I like.
Kinect is even more casual than Wii at this point (due to accuracy) with this library. Maybe those hybrid games will help, but I doubt it.
When it comes down to Move vs WiiM+, unsure, the quality of the motion controls seems about the same. Offscreen pointer feedback is better on the Move, its just that the delay is bad on Move.