Until the Windows m8 is even unlocked (as the Chevron method will no longer work) and someone manages to make a dump from it, nothing will happen.
Maybe it will still be possible to pay a fee and register it as a Developer device, for publishing apps to the market.
Then when that does happen, getting it to boot on the Android m8 will be the first challenge at hand, as it will have to have the bootloader and firmware ported as well.
Getting all of that ported over to any other device will be a huge challenge and I wouldn't personally hold my breath on anyone getting this done, anytime soon, if at all.
Just being straight about it.
It's not the same as porting android from one device to another.
In my opinion, Cotulla would be the guy to do this for the m7, if he has any interest in doing so, but again that's just my opinion.