Microsoft plans a completely new GUI for versions of Windows 7 running on the kind of high-powered computers that now run Vista. The same team that designed Office 2007 is in charge of this interface, and it's likely we'll see something like the Office 2007 Ribbon in place of Windows' traditional menus and toolbars. Unlike the Office Ribbon, however, the new UI whatever it finally looks like will be something you can turn on or off, so corporate users can maintain the same interface they've been using for years, without expensive retraining.