Stable diffusion demos haven't been too interesting to me, but some folks having been combining it with Minecraft in an interesting way. To quote the creator:

DiffusionCraft AI is an experiment where I combined Minecraft with Live Stable Diffusion.

The idea is to take a still from the minecraft video game and to use that as input for a stable diffusion algorithm.

Examples

It results in images like below.

It's a pretty clever, and enjoyable (!), way of creating starting points. The pixelated world that you can create with minecraft can be used to resemble actual buildings, so it's not a big suprise to see houses getting created.

More

If you're interested to see more examples, including very creative ones like space universes, you can get a full preview on Youtube. There's also a PCMag article that gives more details.