I personally love Metro, and I'm not the only one in my circle of friends. I accept that not everyone likes it, but I really prefer a text driven design like Metro.
I think Microsoft gets that Apple doesn't allow itself to be driven by focus groups, but instead they allow random insane people to drive them.
IIRC, it was an experiment in gameification and Office and the ribbon was the thing that was new at the time, and it made sense to write it on top of teaching users the new UI.
While we're throwing around anecdotes on how incomprehensible ribbon is, I know plenty of people who are totally fine with it. I don't really use any MS products (and so never encounter it) and don't have an opinion on it, but I think phrases like "no-one likes it, so they shoehorn it into more places" are neither true nor even potentially valid (no one likes it so they use it more because... they're evil? They want you to hate them?)
Haha man what losers. That'd be like using solitaire and minesweeper to teach the mouse.
Zune (where I saw it for the first time) failed in the market. Windows Mobile (that has the Metro theme) failed in the market. Now I don't know XBox (at all) and its GUI, but its success happened long before Metro was created.
People don't seem to like it in the new Windows preview all that much, either.
Why the big bet on Metro?