Sam Moreau, Principal UX Designer for Windows, at \\Build on Day 2 talked about the Metro Windows 8 UI.
"Where did swiping from the edges come from? What is the idea behind Charms? How do you swipe through apps backwards? Should every application migrate to a Metro style over time? Where should developers who are new to Metro start? We cover all of these and more."
Behind the Windows 8 Metro UI:
The Windows 8 Task Manager allows you to quickly find an application and close it, view the heatmap to diagnose performance issues, understand processes through groupings, and use friendly names and web searches to find out more information about a particular process.
Windows 8 Task Manager:
This video tracks a human's eye movements as they look at the new Windows 8 Task Manager.
Task Manager: example eye tracking data: