[darryl]

It's far too early to tell whether drones will ever be a viable delivery system, either generally or for specific instances. But don't write them off either. It's nice to imagine my letterbox being replaced with a drone delivery dock perhaps broadcasting its identification. It may well come to nothing, but it wouldn't be the first idea to be ridiculed only to later become ubiquitous.

Amazon and others are trying to innovate and are on the lookout to buy companies that are innovating. There are ways to at least potentially avoid the innovator's dilemma which B&N did not try. Amazon does seem to be trying at least some of them.