Could someone clone MS's IL for another OS?

[rgparker at west.net.bbs]

Could someone write a clone of MS's new intermediate compiler language to
native code compiler in order to write Perl, Python, or Eiffel on
Windows, compile it to IL, and then eventually native code compile it on
some other OS platform?

Does anyone think such a capability is a good idea?

Does anyone think that someone will do this?