The Wikipedia entry about Windows 8 claims in its [Metro section](http://en.wikipedia.org/wiki/Windows_8#Metro-style_applications) that

> 
> Metro applications will be cross-compatible with both x86/64 based
>  systems and Windows on ARM.
> 
> 
> 

but does not have a reference (it is marked with "citation needed").

Technically, would it be possible to run a "native" Metro app which was build using WinRT for x86/64 on ARM?