Windows 8 - Everything We Know

Just when most people are getting used to Windows 7, it's already time to start looking ahead to Windows 8, scheduled to be release in summer or autumn of 2012.  There's already a lot of information available, both from Microsoft and some enterprising leakers.  Here's a round-up of what looks to be in store for Windows 8:

Improved Interface
Aero will continue to be an interface to Windows 8, but it will be joined by "Immersive", which includes elements of the "Metro" GUI beloved by Windows Phone 7 fans: