If you are wondering how the experience of Windows 8 would be without a touch-screen then watch this video of Windows 8 Consumer Preview. Windows 8 has been so designed that it can be operated with mouse and keyboard very easily.
Tom Warren takes a look touch gestures in Windows 8 vs keyboard and mouse:
What would you prefer as an input device for using Windows 8?
Tom Warren takes a look touch gestures in Windows 8 vs keyboard and mouse:
What would you prefer as an input device for using Windows 8?