Seeing the previous krita-ai-diffusion demo and the skill of the demonstrator in selecting and img2img'ing encouraged me to give Krita a second try (it turns out my laptop+Mint had a keyboard setting which made the panning shortcut break, so I've fixed that and now it's far more usable. It was 'disable touchpad when typing', so Space wouldn't pan with the touchpad).
As for this video, it's great to see the ComfyUI integration (and with a logo on the node too!). The tool was already powerful and impressive, and this seems like a huge step up.