Amazon has expanded its UK-based drone research center, creating 400 new positions to fill in a week that followed a ground-based delivery drone trial between courier firm Hermes and Starship Technologies. In the US, Walmart is apparently braced to follow Amazon’s lead in order-placing buttons, but are these new technologies just marketing gimmicks? Well, as you’ll be able to tell by the slightly clickbaity opening, they do have their uses. Amazon’s Dash buttons are perhaps the least viable of this new crop of devices that are trying to remove any friction between a customer and their purchasing decisions, but faster or more convenient delivery is a sure-fire way to enable more compulsive online purchases. Outside of the retail space, enterprises,…