I don't think the goal is to make sure the Kinect is used in every title. Rather, it allows any title to use it. Currently, the Kinect is a peripheral, which m

I don't think the goal is to make sure the Kinect is used in every title. Rather, it allows any title to use it. Currently, the Kinect is a peripheral, which means that developers can't assume that it's there. If they want to use it, they have two options: be a full-on Kinect game that doesn't make sense without the device, or have controller-only options for everything. That's a lot of pain. But if they can assume that the Kinect is always there, there's no tradeoff.