Metro was designed by experts
A good user interface is all about delivering content to the user, and the entire UI design team at Microsoft enthusiastically agrees that Metro provides a truly superior user experience. With regard to enterprise use, usability experts point out that productivity is impaired by trying to work on more than one thing at a time, and Metro is intended to prevent you from doing just that. 3D effects and the like simply distract from the app content, and aren't necessary when all applications run full-screen.
Remember, Windows 8 and Metro were designed by Microsoft, the true experts in computing. While some users may initially complain about having to learn a better way to do things, Metro is poised to usher in a shiny new age of computing, merging the demands of content providers and enterprise managers.