I can see an Amazon Prime subscription coming with some type of landing pad dongle. You lay out your mat & dongle somewhere, put in an address and the drone f

I can see an Amazon Prime subscription coming with some type of landing pad dongle. You lay out your mat & dongle somewhere, put in an address and the drone flies to the address, listens for the signal from the dongle and drops the package on the 'X' if the details match. My bank currently gives me a two-factor dongle for secure logins, same type of approach for authenticating delivery and indicating a safe landing area. There is a lot of really interesting problems to solve to turn this into a commercial service. Would be very fun to work on.