ZD Net noticed a new Microsoft blog post strongly implies that Windows 8 on ARM will run both Metro-style and Desktop apps:
This is kind of a back-handed way to confirm something, but that seems to be the way things work at Microsoft when it comes to Windows 8.
Late last year, there was a rumor that Microsoft had decided to drop the Desktop from Windows 8 on ARM. This would have meant, if true, that all Windows 8 ARM apps would have to be Metro-style applications. Metro-style applications are those which make use of the WinRT Windows 8 runtime/framework. (They also happen to adopt the “Metro” look and feel/design conventions, which confusingly are not known as “Metro-style.” I guess they’re just in the Metro style.)