I doubt it will be on rails, but we'll find out soon.

Gears of War with KINECT is pretty good but I hate games that are on rails, so thats a bit dissapointing.

We knew this was coming, but I do not want it.

Since I own a Kinect with 3 games for it, I figure there are a lot of ways they could do it. There are a number of different actions you could to to chainsaw a Locust. You could lift up both hand do a karate chop motion, or a slicing motion with one hand, or any other number of other ways. Imagine kicking in real life as a way of kicking a chainsawed Locust away. Or a stomp to perform a stomp haha. I don't know, it just seems like a really fun idea. And that is ultimately what games are meant to be, fun.

Lol on rails action with your hand as a gun OMG Kevin Butler you called it last E3. 

Yeah just like he called motion controllers never catching on, then deliberately copied the Wii. Good call there moron.

It's not a bad idea since most modern shooters already feel like on-rails, being so scripted, linear and directed.