Probably all three eventually.
If there's decent Move support for existing shooters, I'll be picking up a $50 controller at minimum upon release. For the cost of a controller, why wouldn't I. RE5 Move support would do the same as the Wii did for RE4 for me personally. Any good FPS shooter that gets a Move control patch would be welcome as well.
I won't buy a Kinect add-on kit for my old Xbox 360. For starters, there are no games among the initial list that I would pay $40 for, much less $60. But... if MS has really really good bundle pricing on a Kinect/250GB 360 S, I'll probably just pick one of those up to replace my old 360. If they price it at $399 or more, I'll take a pass on a Kinect bundle until someone actually releases a game for the peripheral that I'd buy.
Assuming the 3DS launches with an RE and MGS game, I'll *try* to pick up a 3DS through Amazon or any local retailer if I can find one upon release. My guess is that they'll be as hard to come by if not harder, than the Wii during its first year on the market.
