Just think of it, YOU can be the one implementing AI into games through API's or learning how to code them into your game. You could do this in a creative way so it's still a unique game to you and for your players. Once AI can do it all on it's own, it's up to the creativity of the prompting that will set games apart depending on what kind of things they implement, so you'd definitely still be able to sell games, especially if you've made a few successful ones at that point (with or without AI in them) and because you'll have people who are loyal to you/your brand/your games they'll be much more likely to buy your new ones just because of that.

Besides, at that point, probably most people won't have jobs, so you absolutely won't be alone.

I agree with u/gantork i was about to comment the same, as an indie dev is great that all these tools are coming out. AA quality games in the future made by one solo dev may be possible.