It's interesting to do some ball park numbers on how many delivery drones we could see flying around. Lets take Amazon alone.. Some reports say that Amazon warehouses are processing a few 10's of orders per second. Other reports suggest that 80-90% of these are below 5kg so could potentially be delivered by a drone. That means we could be looking at say 10-20 drone flights per second from their warehouses. That's a potential of about 1,300,000 flights per day per warehouse. That's a staggering number and probably wrong but it is based on todays figures, allows nothing for growth and is just Amazons potential let alone other companies.