Amazon recently announced they intend to use drones to speed delivery of customer packages to their front door. The service, in testing phase currently, is to be called Amazon Prime Air. While I have no doubt they really are testing a system like this, for now it seems more like a publicity stunt. They are just the latest in a line of companies announcing drone deliveries of everything from pizza to textbooks. I would not be surprised to see UPS, FedEx, DHL, and other shipping firms start their own testing programs.
While I think the concept is interesting, regulations will obviously need to be worked out first, and reliable systems with proven track records will have to be developed.