Essentially, one group provides the content, branding, some kind of licensing data structure describing date ranges and countries, and so on. An abstracted look and feel. Another service spits out the app and has the streaming infrastructure.
The apps produced would have the benefit of reaching many, many platforms and so deduplicate a lot of the work getting something to work on a Roku, or a Firestick or a Chromecast. This could open up the door to a lot of smaller groups and allow them to focus on obtaining, curating, and producing content, their specialty.
Netflix could be that platform. Of course, they would have to be their own clients first, learning how to abstract the Netflix app, going over their databases and adding columns to various tables, marking all of their content as ContentID = 1 or something. Once they got through that exercise, they could reach out to the smaller providers who are struggling.