Just saw this information on the Gamestop website;
"Easily turn Xbox One and Kinect on or off.
To turn off your Xbox One, just say "Xbox Off." This puts Xbox One into standby mode where it's only listening for the voice command, "Xbox On."
You can also turn off your Kinect through the system settings, or you can simply unplug it. Xbox One does not require a Kinect to be plugged in for the system to function."
So if it's no longer needs to be plugged in, why force the consumer to buy it? Just remove it, bring the price down and let us have the choice.