Possibility to activate multiple cameras at the same time
Thanks to this we could make a two-player game with split screens or make a minimap more easily or even easier to design a UI and many other cinematic possibilities.
Yeah I think people are hoping that VR being able to render two slightly different views could change that, but it's probably a pipe-dream at best. Maybe on PS5, but not before.
They already said that the engine is unable to render the dream from two cameras on the same system.