Will Amazon Prime Air actually come to fruition? We don't think so. There are many unanswered questions and technological barriers to overcome. Is collision avoidance possible? Will they be able to fly in challenging weather conditions? How will privacy issues be dealt with? What about logistical practicalities - how would you deliver to a flat in a tower block? Then there are regulatory barriers, safety and security concerns... As you can see there many reasons why drones are a long way off from being used to deliver packages in our opinion. What do you think, might we see multi rotors soon replace the postman?