Metro UI
Having played with Win8 CP over the weekend, it would appear that the Metro UI is gearing up for Kinect control to some degree; Fluid, single digit or two digit control (pinch to zoom), unlike iOS with its 4-finger swipes, lending itself quite nicely to being used by waving your arms about a la Minority Report. IIRC there were reports of laptops being developed with Kinect sensors in them too.
That's not to say that people will be preparing their business reports on the train by waving around, but possibly useful for presentations where there is no mouse, slides are navigated by moving your hand, or for video walls. Or home televisions being used as a media centre.
So MS seem to have prepared an OS that has the possibility of being navigated by mouse and keyboard, by touch and possibly by Kinect.
Just my $0.02