Very realistic. Must look up this AI Art Hub, see what they're about. Hopefully more about art than the trolls and such that seem to be all over most of the Facebook AI groups I've ran across.

The tech and models are indeed evolving. I just ran some of my very first SD prompts in the version I'm using now, which is still about 3 builds behind. And I am amazed at what I see.

Prompt: god of love, Cupid, 20 years old, male, gorgeous, detailed face, amazing, thighs!!! flowers, intricate, highly detailed, digital painting, artstation, concept art, sharp focus, illustration

1.3.1 version, NMKD Gui Stable Diffusion gave me this. And I had to invoke two of the Artists Whose Names Must Not Be Spoken just to get it (sorta) useable.

Without Face Restoration or negative prompts -- those hadn't been invented yet. Later I did find an online fixer/upscaler that improved it a bit. Would still need much post work to be good, especially the eyes.

Skip ahead 8 months and here's what the same prompt brings me. With absolutely no need to invoke any particular artist or style. Still needs upscaling if I want bigger. But the quality. Yep, big difference. Also probably helps that I'm not using the basic SD model, then again, there was just the one that came with back in September. 

Tomorrow I'll revisit the Aphrodite renders I attempted back then. Most were, shall we say, less than befitting a Goddess of Beauty. I've a feeling this time she won't need to go around the temple wearing a paper bag. ;-)