This isn't the scaling phase. Dash is also an API for automated ordering. And the button is a test to measure the usefulness of such API.Once there's data proving the idea, and an available API, Amazon and it's partners will scale this.
Good point about being an API. When combined with RFID, I can imagine smart fridges / washing machines utilizing this API to automatically order (or suggesting human do a 1-click order) when your Tide is about to run out.
