Neowin published an introduction to the Windows 7 UI
>> Introducing the Windows 7 UI
During the Windows 7 reviewers workshop on Sunday Linda Averett demonstrated the user interface enhancements introduced with Windows 7. Keeping with the trend, Averett described herself as a PC, wearing a red top matching her fall colored desktop with orange and red aero glass tones.
The session was an overview of some new features demonstrated on Windows 7 build 6933.winmain.081020-1842. Unfortunately the build that will be handed out to PDC attendees will not feature most of the enhancements I am about to detail.
First up was the new Windows 7 desktop. The new desktop includes a thicker taskbar, improved system tray and no sidebar. The orb on the start menu also glistens after hover over.
>> Introducing the Windows 7 UI