Windows 8 Ribbon for Explorer
another MS vid, this one for Explorer:
I have to admit, this actually looks pretty good to me.
Now about the ribbon -- which replaces the Menubar and Toolbar in apps -- I was not familiar with this interface element. And it seems to be a bit controversial, as some people really don't like it. But just looking at some vids, it looks pretty usable and handy to me. Again, this isn't from real usage, so there might be some issues I haven't dealt with -- but just looking at the presentation videos, I like what I see.
Here's a video where someone defends the ribbon (a little too strongly, IMO). But I can see his point.