> only G5, x1000 and potentialy X1000 and OpenPOWER is out there.

Not to forget X1000 ;-P

> they develop x64 MOS on VM on MAC G5 / X5000?

No, in VM on x64 hardware.

> would be better for us to go PPC64 first and ... not vice versa.
> So they will [...] Backport to PPC64

Who says PPC64 support will come at all?