Because Jeff Bezos hasn't yet figured how to wire your brain directly to Amazon's warehouses, the company is experimenting with cluttering your home with special-purpose buttons in the name of e-commerce. Its new Dash Buttons can be put up anywhere -- kitchen, bathroom drawer, broom closet -- and programmed to put in a buy order for, say, laundry detergent, by syncing to the Amazon mobile app over the user's home Wi-Fi network.