So I saw today that there is a new AI text to image generator called Stable Diffusion. You can try it out here.
I ran the same test and here's what it came up with:
I think we can all agree that these AI results are much better. That being said, if I were trying to use this as concept art for a game, it's in the right ballpark, but you can tell by looking at the images that they have this "odd" look to them, like if you tried making something with real Lego bricks and an assortment of knock-off Lego bricks.