Given the increasingly complex ways in which film and television shows are financed and distributed, that's not likely to happen anytime soon. One single entity owning worldwide distribution rights for any given title is very much the exception nowadays, not the rule.
It works for Netflix. If HBO and a few others slowly transition to the Netflix model of selling their own content direct to end-customers through their own service (worldwide) then this will all become a moot point. There's really only a handful of companies that would need to do this and +90% of the need to bypass geoblocking would be gone.
It will happen in time......