Kinect MUST be included in the Xbox One. You can NOT make it an optional accessory and have it wildly implemented. Like the Xbox 360 all games were required to run at least in 720p. Even though most people didn't have HD Tv's for a few years after it's launch.
Most people will like Kinect one they use it a bit. Can we just stop with the whining and speculation that a core component of the Xbox One is going to be dropped?
It would be bad for the future of gaming if it was dropped.