What made me laugh was the way Steven Sinofsky tried to tell everyone that their own user feedback drove the Windows 8 UI design, saying that no-one used the start menu anyway. Doh!
If you look at the MS have worked, there hasn't been any improvement to the UI since about Windows 2000. Everything else has been irritating, whether it be the hiding away of Windows Explorer in XP or the disappearance of the command prompt icon.
However MS needs to make a profit so they put more and more lipstick on to try to differentiate visually without improving the user experience or productivity. If you look at the keystrokes required to do things in Windows 7/Office 2010 compared to XP/Office 2007, there are usually more. How that is a productivity improvement I don't know.
The latest for the past couple of years has been to use CAPITALS in menus. I have no idea WTF that is about.
Yes, the ribbon on Office is irritating to say the least, removing the keyboard menu shortcuts visually that we all used. But MS have a history of this kind of thing. Clippy as an example. DOS4 is another.