As an amateur game developer, I see the boost AI generated content can add to a game, but right now none of the tools are ready to become featured assets. The only games using them heavily are likely games that won't bring any value to Valve, so it is an easy call. This will change in the future.
I am excited to see what AI generated content will do though. Already it can be used for bad textures and sprites. Bad music and pointless character blather too.
I'm really unimpressed with the current state of most AI generated content, although I do appriciate that it's tecnically very impressive
Still, I just realized that at some point in the future video games will likely include full free-form dialog with at least some of the characters in it. Crazy to think about