With Windows 7, users can directly manipulate their computer environment through multitouch for the first time. This fundamental shift in the end-user experience is similar to that which occurred with the introduction of the mouse. Users spontaneously report that they perceive touch features as an evolution toward a more 'intuitive' way of computing. They expect that touch features will make their daily PC activities easier, faster, and more convenient,” Microsoft revealed
Microsoft has had no killer applications with Windows 2000, nor with Windows XP, and certainly not with Windows Vista. And perhaps the Windows 7 touch killer applications will themselves emerge as such in hindsight, and not be NUI revelations. However, Windows 7 is ready to share some of the immense success of other NUI-enabled products such as the iPhone or the Wii console.