Yesterday you saw a fuzzy video demonstration of Aero Peek, one of the new features coming in Windows 7. Peek supercharges Windows' taskbar thumbnail previews, and lets you view, close, and switch between multiple windows by just hovering over the taskbar thumbnail, as well as pin programs to the taskbar permanently. Here's a firsthand screencast of what this looks like in action on your desktop.

Notice that when an application has more than one window open (window, not tab), hovering over