We need to be able to at least tell whether we're on Windows or Unix from the PSVersionTable.

Ideally, I'd like to be able to differentiate Windows Server, Windows Desktop, Nano Server, OS X, and BSD from Linux.

Since PSEdition Core runs on Windows (and even Windows Desktop), and since CLRVersion will presumably be the same across all versions of Core (even if it were populated #1984), and since "BuildVersion" is going backwards ...

I also think that PSVersionTable should expose "Architecture" (ARM, AMD64, x86).