A Fat Marker Sketch (from Shape Up).
More here.
An AI feature to not only provide high fidelity UI elements (what Tony and team are working on) but also broader more conceptual sketches based on some text prompts (or inferred from parts of the Breadboard) would be a boon for conceptual designers looking to leave lots of latitude for their future selves and others when the realities of a project set in and people are in the context of doing the real work.