In Windows 8, Microsoft creates a consistent user interface for computers, tablets and smartphones by morphing the Start menu into the Start screen, a finger-flicking environment that presents Windows Phone-like tiles with live data from the apps they represent, which launch when tapped.
No real news there. What's different is that the release version's now more responsive to mouse movements, bringing up Windows 8 features when pointing at hot corners. This is illustrated during installation and at a few points after first running the new OS. But it's quite possible that new users might never see those clues, and unless their mouse pointer wanders into hot corners accidentally, they're bound to be frustrated enough to pick up the phone.