I'm also interested on any information related to the possibility of making use of a Phi co-processors, from within Mathematica, and just with "pure" WL.

Also, beyond the OP questions, I'm interesting to know how Mathematica license scheme is adapted to this use type of processing scheme (although, if Mathematica doesn't support Phi, it is probably no yet adapted). I mean, I can use any amount of GPU power (I think), as long as it is controlled by the amount of CPU licenses I have (and this is probably going to be amazing on the near future :-), but being Phi co-processors of CPU "type", how would they be seen in terms of license?