I wouldn't feel that smug considering these are single prompt generations on a pretty small project.
As Two Minute Paper's always says, it's not just about what this looks like at the moment, it's about what this might look like another three breakthroughs down the line.
While you can't guarantee further breakthroughs, at the rate of advancement and pace of improvement, you would have to be brave to bet on no further breakthroughs.
I agree with you, but I think it skips over the fundamental point of the demo - that this is possible at all. The door is unlocked. I expect where commercial interests will take this over the next year or two, even without further "model breakthroughs" will be enough to change how many devs engage in game development.
As Two Minute Paper's always says, it's not just about what this looks like at the moment, it's about what this might look like another three breakthroughs down the line.
While you can't guarantee further breakthroughs, at the rate of advancement and pace of improvement, you would have to be brave to bet on no further breakthroughs.