The difference between these three industries that rely on 3D animation is the speed at how and what they work.
So, in games the goal is to minimize as much information as possible because it runs on a game engine and can’t be too heavy orelse it will be limited to where it can be run and played.
In tv it has to be the quickest because of the tighter deadlines, so less detail and time of animation.
Finally, in film animation is where it takes more time and more attention to detail is needed because films are made of it, so ofcourse animation is the main part and important thing of this industry.