Not that different than buying any other game, I think.
I for one, actually like this model, because how many games with 20 hour campaigns have their audience play to completion? A staggered release allows the audience to relax between missions and come back to the game at their own pace.
It's exactly like Resident Evil Revelations 2 (though it was a weekly release for every chapter) which a lot of people seemed to enjoy and appreciate. Except that was a budget title and this is a bigger release.
I'd still call it a different proposition to buying a £50 boxed product right out the gate.
Mainly because you don't know what the hell you're getting down the line.
But it's good to see some new delivery models being attempted by IO for such a large property. The idea of one off 48 hour contracts seems really interesting
I enjoy Hitman anyway, and hope this turns out well for them.