Weta is researching and building (amongst other things) graphics processing technologies.
Being able to take cutting edge technologies from the film industry, optimising them and selling them as “click and go” solutions in Unity would be a huge win.
StageCraft is the only thing where there is even a small overlap between game tech and the film industry, and that one is using Unreal Engine. Other than that, the special effects used in movies render at minutes per frame, not frames per second as in games. There’s no technology suitable for Unity in that.