The question is however: is it a good thing?
In my opinion, there cannot be a thing that is good in an absolute sense, everything has both good and bad qualities that influence civilization in positive and negative ways and it is a matter of determining whether the balance is even or if it is heavily one or the other. And although I am fascinated and awed by the accomplishments made and continuing to be made that enable AI to exist, I suspect it will ultimately have an overwhelmingly negative effect on nearly everything, from the realm of the interpersonal and social to that of the psychological, physiological, spiritual, artistic, &c.
It is a tool and has the explicit function of lessening the burden of labor in any environment virtual or actual where it can be applied, but inherently poses a potential for lessening the necessary efforts involved in creativity, and as has already begun to happen I anticipate it will only further diminish the effective power of video games to engage the imagination, instead becoming a 'service' which lulls players into a hypnotized stupor of obsessive virtual achievement collecting or replacing interpersonal interaction with an online virtual simulation of such.
But regardless this is secondary phenomenon for me, because I don't believe that there will ever again be a new age in video gaming, or more precisely a new golden age or anything even approaching it. Golden ages do not recur in the lifetime of a civilization, and art history is filled with examples of how although patterns predictably recur at regular cycles true renaissances do not happen to within the civilization from which the stylistic origins emerged, they happen amidst new cultural environments typically in an early phase of its development.
As far as I can guess, and using history as a guide, video games as an art form already peaked in the mid-eighties to the late-nineties and it is only going to be further downhill as time marches forth, and likely the degradation will even accelerate. Like Miyazaki said, art must have an intention, and AI can only be guided by parameters predetermined; even where it innovates, the 'intention' to do so is not autonomous. Without intention, no matter how technically astonishing an AI generated particular thing may be, it will never contain the emotional intentions of a human being, forged in suffering the agonies of the slings and arrows of outrageous fortune. It can be a wonderful tool for assisting in the development of mundane tasks, but I do not imagine it will be the hallmark of a new golden age.