WinRT for 'desktop' apps

Question

So I'm reading up about the differences between the old and the new APIs, and I can't find whether the new WinRT API will provide for desktop apps, so far it seems its only available to write Metro apps - ie the full screen, 'phone style' apps.

Does this mean that I can write a WinRT-based app and it will be invoked from a desktop but display like other Metro apps (eg IE) and I won't be able to write an old-style desktop app that runs in the old-style desktop?

What does this mean for server side apps? I imagine WinRT would be the API of choice for servers, now that Windows Server comes with an optional GUI, so I imagine that if I can write a windows-less app using WinRT for the server, I should be able to write the same for the client too? (and if that's the case, surely I could connect a non-Metro UI to it)