I gotta say, I really like it. The new design will take some getting used to, but having used metro on my xbox, I am pretty impressed. The look is clean, well laid out and information rich.
Microsoft have also done well on the windows phone side to make sure the look is clean and consistent across devices which bodes well for ease of use and also for user experience as all devices have the same software and capabilities. In theory you should choose the one you like best and it will work well. As a solid android user, that is really tempting as I know the pain of waiting for updates that may never come and having to root or install custom roms to get good battery life and optimisations. By making manufacturers release phones to a "better than" spec, it stops the platform feeling slow or being compromised by slow and cheap devices. It also future proofs the devices to an extent.
Windows 8 is also looking good and hopefully people will get into the new look once they experience it.
Overall, Microsoft seems to be building a great software ecosystem that works well over multiple devices and provides a real alternative to Apple finally. It looks to have been built so that it works everywhere you are from the main computer to the lounge to your smartphone.
Im also finally pleased to see Nokia doing tv adverts as if you just watched tv, you would think the iphone is the only smartphone available. This is what I hoped to see from the Nokia/Microsoft partnership and android/ other manufacturers don't seem to advertise here really. If they keep this up, my next phone will be a windows one to match my windows 8 desktop and netbook!
I like where they are going, what do you guys think?