Microsoft's new Metro UI supports all major input types like touch, keyboard and mouse, trackpad, etc., but it was really designed as a "touch first" experience. That means upgraders with current "non-touchable" PCs and notebooks can bring their keyboards, mice, and trackpads along for the ride, but there are times it can be frustrating using Windows 8 without being able to touch it.
I won't say it's bad with a keyboard and mouse, but anyone buying a new machine with Windows 8 will likely be treated to a touch experience, which in Metro is exceptional.
