Its never going to happen. Because console players by far dominate the gaming scene. Microsoft is going to push Xbox first, which will drive all development of the games, which is going to be windows focused. As such, all major release studios are going to target that.

Until we get something like CoD titles being Steam Console first, linux is allways going to lag behind.

That being said, I think we are on a precipice of AI being able to simply just rewrite games from concepts. Start with generic source code for an FPS or 3PS, then people can contribute changes in english language to tailor the game. So it won't be even copying source code, it would be copying concepts and then making a new game with it. There have been a lot of games that have very rudimentary graphics that people played in large numbers because the complexity and gameplay was quite good.