and who are those now ? either Canon 5Ds/r @ 50mp or Sony A7R2 @ 42mp or N D8xx @ 36mp ... so w/ what you grab them really just with 44x33 @ 50mp ? when those C & N & S have multiple native lenses and multiple (Sony) adapters and tons (specifally for C&N) accessories = or will H go for a kill with 100mp Sony sensor to make the gap ? or H will throw multishot, etc ?
My best guess is that they indeed will compete with 44x33mm 50MP Sony. Might not be the most impressive number, but it's medium format and it's Hasselblad. I don't think they will need the highest numbers or longest feature list to win substantial amount of customers (Leica does fine too, with even less impressive numbers), and I guess if they get 1% of those that otherwise buy Sony A7r it's still a huge success, they're just on an entirely different volume. If the rumor that it's manufactured in Sweden is true, it's not going to be a huge volume product, but I think it can have the potential to be a larger seller than their H6. So when I say "mass market", "large volume" I mean compared to Hassy/Phase today, rather than what Canon/Nikon/Sony sells.
For those that look deeply into performance past the numbers, it will be much about lens availability and quality, so I think it can perform really well compared to the high MP 135 cameras. I'm sure we will in time have lots of comparisons.