Not necessarily. How fast does a drone fly - will it always be faster than a moped, especially on a short, direct route? Also, more significantly, what's the maximum weight a drone can realistically carry? A moped can carry several pizzas at once for delivery to multiple addresses. Plus 'awkward' orders (litre bottle of soda?) aren't really catered for by drone, as far as I can tell.

Not totally dismissing the technology - drones obviously have great future potential and, hopefully, are ultimately far better for our environment - but not convinced that takeaway delivery is a suitable use case.

In an urban area? I doubt it. Sure, the pizza delivery guy has to deal with car traffic, obstacles, and pedestrians. But the last 100 meters s/he has to enter a PIN to get into my building. Then has to be buzzed in. Finally has to scale 4 floors.

The UAV that can do all of that hasn't been engineered yet and won't be cheaper than a part-time college student.

At this stage UAV propulsion is quite primitive. Their fixed-pitch blades don't compensate with changes in the environment well. While this is not a problem for small hobby/camera drones large, cargo carrying drones will have real problems compensating on a windy day.

The collective-pitch mechanisms in modern helicopters and VTOL are marvels of engineering (read $$$). The reason they are used is to allow large lifting bodies to change thrust without changing rotational velocity.