What was the whole point of Kinect 2?

[fireburn95]

Kinect was meant to be a reason to get a xbox one game over a ps4 game - they envisaged every game would be 'better with kinect' and have 'kinect exclusive features'
they thought the cost of kinect would justify the money that came in from people choosing xb1 game over ps4 game, but it didnt work out