But they didn't standardize the interface. Excel workbooks still open in the same main window, while Word documents have one window each. The Mac version is actually consistent, which drives me up the wall.
I suspect that given how Microsoft is organized, the changes in the Vista interface and the changes in the Office 2007 interface were actually two different initiatives. Put together that's an awful lot of change for what seems like very little actual value. All IMHO, of course.