Oh word?
Name the games you're talking about that the Kinect enhances the control.
what ps4 games are enhanced by the touchscreen.
Obviously games aren't out yet, but I'm talking about the capabilities and potential of the kinect.
On a system level it improves the control and interaction you have with the UI. Automatic log ins. Automatic split screen switches if controllers change hands. Voice and motion controls in the menus.
As far as games go. With the added power and accuracy "better with kinect" games will actually be better. Things like reading your pulse or the positioning of your spine can be added to gameplay in very interesting ways. The fact that the kinect is a part of the system will encourage developers to do new things with the tech.