Nice concept, but the canvas size is a pain point. If it’s too small it loses detail, too big and it drags. You’d need a micro‑LED array that updates in real time without draining the battery. Also, the sensor array has to interpret subtle muscle tremors, not just heart rate. It could be brilliant if the art style is customizable, but right now it feels more gimmick than genuinely expressive. Need better ergonomics and power‑management. Still, the idea sparks some exciting prototyping avenues.