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Adinnieken on 26 April 2013
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walsufnir said:
Adinnieken said:

Metro is a bit more complicated than that.  Metro is a UI, but it's also a mini OS.  A Metro app runs in Metro, not Explorer (the Desktop UI).  My guess is if they wanted to, they could cut Explorer entirely from the OS, and just run Metro.  Currently you'd lose a considerable amount of functionality, but the basic premise is true. 

Ehm, no. Common Windows apps run on Win32 API, Metro-Apps on WinRT. This is close to os but not really the os. It's another abstraction layer.
Edit: But as I read your comment once again, I think you somehow meant the same thing I did, didn't you? ;)

In part.  Metro (WinRT (x32/x64) has it's own set of APIs/hooks to the kernel.   Explorer does too.  Also, Explorer apps include both x64 and x32 APIs, not just x32 APIs. 

My larger point was that Metro functioned essentially as an OS within an OS.  It isn't just an interface, the applications running within Metro are not running within Explorer.exe.