I'm sure they could have worked out a deal... this is Microsoft - did they not want to invest in a key brand? How typical. Microsoft shedding brands like a snake molts. How is anyone supposed to trust their platform?
Metro isn't a key brand. Its a brand targeting developers. The adds for windows phone 7, and presumable Windows 8 will never, have never mentioned Metro.
Really I don't understand why you're so angry, if they'd stopped using Windows, or Microsoft or Office you might have a point, but Metro?