Why aren't the positioning the autonomous drone delivery network as something that is more useful for the first world? I think running drone networks to deliver medicine and small good is merely a stopgap measure to building roads. And once roads are built, I feel that real economic growth can finally commence.
<aside>In fact, having this drone delivery network in the 3rd world may retard the development of roads; roads will only be needed to transport big things, and people can get by with continuous delivery of small things via autonomous drones, thus it will take longer for roads to be built because there will be less demand.</aside>
If this dialectic between roads and these drones exists the 3rd world (or rather, our idealized 3rd world with no roads), what about the first? Couldn't these drones be used to reduce the number of delivery trucks, as small, light items would simply be delivered by drone? Think of the reduction in carbon emissions and the reduced cost of road maintenance that would be the result of shrinking fleets of delivery trucks.
The above scenario, I feel, would make for a better pitch video. Showing me how this network can be scaled to improve the environment (and roads) around me is going to make me much more likely to open my wallet than telling me a story about some imaginary farmer with a broken tractor part that can be printed up with a 3D printer.