Real medium format starts at 6x6cm

. Doug is pretty famous for Hasselblad bashing, so I'm not surprised by his comment. But of course it's a 44x33mm sensor, I don't think a reasonable price that would allow a volume model would be possible with the 54x41mm sensor at this time. But sure I hope that the mount is not limited to 44x33 (which I initially thought it was, but now I'm not as sure).
Price is
the most important part of the game changing bit, making Hasselblad cameras accessible to more people and not only working professionals.
If we're going Hassy/Phase like Nikon/Canon I could say that in the mirrorless range Phase One has the A system, which to me is a pure luxury product, with embarrassingly poor lens-sensor compatibility

Phase One's strongest point against Hasselblad these days is Capture One. But Phocus is getting better...