Shifting Skill Competency and Job Requirements

Shifting skill, competency, and job requirements are occurring at an increasing pace. For instance, the use of drones has been proposed by retailers like Amazon.com as a method for package delivery. If drones eventually become a widely adopted technology for this purpose, some workers who are employed by delivery services or warehouses might become displaced. If the displaced workers were to become drone operators, their knowledge and skillsets would have to change.
There are many examples of shifting skill, competency, and job requirements throughout the world of work. Identify a job (or group of similar jobs) that have changed and required different skill sets. (Please use examples other than drone operators.)
Explain the background for the shift.
Discuss the knowledge and skill sets that would have to change.