Having worked in games, the AAA costs coming down by automating art isn't going to make them cheaper to make, though they will probably get more content. AAA is partially about the spectacle, the vast investment smaller games can't match, so the spend will continue to grow despite cost savings. As long as the current paradigm continues, anyway.

Or we may see a realignment of interests, with the current AAA paradigm replaced by something else. Maybe something free to play or gacha based, such as Genshin Impact, Fortnight, Roblox...though Epic just laid a lot of developers off, so it may transform into something stranger still.