Biggest different is the boot time for windows 8. Much faster. Huge difference is the interface for the start menu, which is now the opening screen u see once u log in. A bunch of other appearance changes.
i torrented windows 8 then the wankas turned off my computer.Its pretty much just the same as a mobile device setup and theres no start button you have to do it yourself if you have a touch screen laptop you can use touch screen but who cares about touch screen.