Yes there is relevance for X#. In short: any platform where C# code runs is also a viable platform for X#. We are using the same code generation engine so there is no difference.
Of course you should not compile for x86 or x64 but for AnyCpu and only use libraries that are available for AnyCPU as well.
XSharp Development Team
I will read more about this, because there are lots of noise around such as the Windows 10 for ARM is really re-compiled for ARM, but all Win32 apps can run on it without re-compiling through emulation or code morphing (what is this?). It is specific about Win32, I wonder if x64 apps runs on it.