Coming up with a spec or design system? I’m not sure what an AI-generated design could possibly be based on and how it would get the necessary inputs from stakeholders other than… in the form of a spec, formulated by someone collating those requirements.
Creating assets based on a spec or design system? Again, I have yet to see any output that can stay internally consistent. Frontend code might even work, despite being a mishmash of half a dozen flavours of react with two or three different vintages of tailwind. But good luck with native code or anything beyond basic CRUD forms.
I recently tried to get claude and gemini to scaffold a tailwind component library from a pretty comprehensive design document. It felt like getting a roomba to swim across a lake.