Thoughtful analysis from MIT Technology Review that slices through the hype and paints a realistic picture of the limitations Amazon will face in bringing drones into service. In a nutshell, the article finds that the technology is feasible, assuming the FAA gets on board. But it will come at a pretty price, perhaps as high as $200 per package. For vitally important deliveries, such as a donor organ to save a life, the cost will certainly not be a deal-breaker.