I don't think it will ever catch fire in animation studio workflows. I can't see it beating the current process of applying toon rendering to 3D geometry. Though it may help renderers add variation to the output in a way that's more authentic and less random.
I'm wondering if it's at all useful in understanding / improving AI's ability to infer semantic meaning from even real images in a variety of scenarios? Like the ability to re-interpret an interpreted construction (drawing) of a scene.
One area of application may be helping machines better understand hand drawn human input?