There's lots they can do...
- cheaper prices (by lowering the % of rent-seeking),
- better pay distribution for creators (Especially so that I pay to support the shows I watch rather than a global pool),
- interoperability (to allow new businesses which provide frontends to multiple streaming services),
- social (clipping and sharing, group watching, etc)
- more equal promotion of shows/movies (instead of based on royalty rates)