Not only did someone at Microsoft think that it was a good idea to make Metro the primary user interface in Windows 8, but they also decided to destroy the classic user interface experience too by also Ribbonizing most of the applications.
That someone is Julie Larson-Green. The brains behind the Office ribbon. Windows is now stuffed at the top with former Office team drones, since that's where Sinofsky came from.
That's also why the media story is Win8 is such total shit. All they care about is email and facebooking your skydrive bing exhange one note sharepoint cloud doodle. Or whatever passionless office wankers care about.