Best i can tell, Microsoft wants to get rid of Win32. But their attempts are hopelessly hamfisted.
In the sense of Win32 the API, I can understand their desire well. ;-) I worked on an application written in C for Win32 for about two years, and while I learned a lot about C in that time, I came to despise the Win32 API.
On the other hand, I don't think they will ever get completely rid of that thanks to the huge, huge body of existing third-party apps.
True! OTOH, I have never seen one of our users use a Metro App intentionally. At most they would run into the builtin PDF viewer if no other viewer was installed or registered to open PDFs.
One of my coworkers has a Windows phone, and he tells me on the phone the interface is very nice. But I still cannot imagine what the people at Microsoft must have been thinking...