Amazon Edges Closer to Fully Automated Retail

I press the white, round button on the Gatorade-branded Amazon Dash Button in my palm. It’s lozenge-shaped, about three inches long, faced with a black bezel sporting the sports drink’s logo. The smooth, concave button is a pleasure to push. It scallops just a little, modestly, less than you would have expected. Then a white LED flashes, and you have ordered Gatorade—or Tide, or Depends, or Kraft Mac & Cheese, or a dozen other household products.