To pull this out of the games industry for just a moment, imagine this: you are a business and need a logo produced. Would you hire someone at the market price who uses AI to generate something... sort of on-brand they most definitely cannot provide indemnity cover for (considering how many of these dubiously owned works they produce), or would you pay above the market price to have an artist make a logo for you that is guaranteed to be their own work? The answer is clear - you'd cough up the premium. This is now happening on platforms like UpWork and Fiverr. The prices for real human work have not decreased; they have shot up significantly.
It's also happening slowly in games. The concept artists who are skilled command a higher salary than those who rely on AI. If you depend on image-generating AI to do your work, I don't think many game industry companies would hire you. Only the start-ups that lack experience in game production, perhaps. But that part of the industry has always existed - the one made of dreamy projects with no prospect of being produced. It's not worth paying much attention to, except if you're an investor. In which case, obviously it's a bad investment.
Besides, just as machine-translated game localization isn't accepted by any serious publisher (because it is awful and can cause real reputational damage), I doubt any evident AI art would be allowed into the final game. Every single piece of that will need to be produced by humans for the foreseeable future.
If AI truly can produce games or many of their components, these games will form the baseline quality of cheap game groups on the marketplaces, just like in the logo example above. The buyer will pay a premium for a quality, human product. Well, at least until AI can meaningfully surpass humans in creativity - the models we have now can only mimic and there isn't a clear way to make them surpass.