Real, unless this is the greatest image generation model ever produced. I don't know of any models that would be able to natively produce an output at those dimensions, and all the upscalers I've ever used look terrible when bringing an image up to a resolution like that.

Don’t the number of faucets, sinks, and outlets seem off?

What about a third possibility, "non-AI 3D rendering"?

Overruled :)