The bigger question is who cares (Score 2, Interesting)

Did you look at the UI preview guide? Maybe it is just me, but it looks yet another attempt to change the UI for the sake of change. They have taken the concepts of menus, toolbars, dialog boxes and palettes and combined them in to one big tabbed blob that takes ups even more of the top of each window. Of course it is similar to, but in no way consistent with that annoying new interface they put on IE7. The only thing they have managed to keep consistent in windows is the need to press ^-alt-Del to login. They just don't get it.