Imo use the normal 3rd party that would otherwise come to both PS3 and 360 and just tack on move support.. And develop an exclusive every now and then primarily for Move and Kinect, it's like this. You're standing in a supermarket and you're a dual console owner, you're torn between picking up the PS3 version of COD or the 360 version of COD, buuuuuutt.. the PS3 version of COD happens to have Move support, so that's a slight advantage in it's favour I guess.
For Kinect it's other matter, not having Bluray amount of space means less content on disks, so if you want to make a game Kinect compatible it'll probably take even longer to rehash it. Kinect games should mainly be exclusive to Kinect with maybe few exceptions slipping to Move. What I like about Move is the fact that you can use standard controller anyway, I don't think there are any Kinect games out yet that allow you to do that. Time will tell, maybe developers will figure something out.