And as Andy walks in from the preivious post...the computer with the Windows 8 senses his presence and wakes up. If he walks away again, it will slow down. Windows 8 will requires much higher speed computers than the prievious OS's, for Windows 8 will require sensitivity and cooperation of the laptop.

My PC Knows Me

Something in Windows 8 that'll improve security of Windows by quite a margin, as a login form of usage of the camera and detection of the face (exact) won't be as easy to hack as the original (user-and-pass)

http://windows8news.com/

Windows 8 - The new OS that will come out in Windows 7, and one of the most powerful gadgets could be "My PC Knows Me", which uses your computer's camera to capture your face, so it could log you in without the traditional (pass-and-user).