My thoughts:
Fleets of self-driving trucks will be on the roads worldwide by 2020.
Those same trucks will have a ‘delivery driver’ inside the cabin for at least another 10 years.
By 2030 all sales of new trucks will be self-driving
From 2030 onwards a robot such as the latest generation Atlas will be in the cabin to handle deliveries.
By 2050 very few, if any, human couriers will be used, instead people will have new jobs coordinating the self-driving trucks, delivery robots and facilitation depots.
DHL recently hosted journalists, customers, and experts in the field of robotics at “Robotics Day” in their DHL Innovation Center in Troisdorf, Germany. The company says “Robots will be part of the future of logistics, and we’re excited to be on the ground floor of what that future cooperation will be like.” https://www.youtube.com/watch?v=YeL-YtaUkWc&feature=youtu.be