It's a win... with restrictions.  I love the Metro UI, and I enjoy using it and trying something new.  As I mentioned in the video, and other people have also mentioned that Windows Phone 7 is designed for the "Think Different" set, and Apple and iOS are the "safe bet" for people purchasing a smart phone.  I believe as "Windows 8" grows closer to launch, more and more people are going to want to be exposed to this interface on their phones, and I believe WP7 is poised to really take off from that point.  Since I believe that iOS is the "safe choice" I believe that if Windows Phone 7 is going to take aware marketshare from anyone in this space, it will be taken away from Google and the Android platform.  I'm sure that I have mentioned this already, but I do believe that the Metro Windows Phone interface will be on the next phone that I purchase and keep.