The people who deliver our packages to us may soon have some competition. In January, the e-commerce giant Amazon announced that it had begun field-testing Amazon Scout, a robot that's been delivering packages to customers in Snohomish County, Washington. The United States Postal Service is also exploring ways to use delivery robots. According to a post on the Amazon blog Day One, there are just six Scout robots in existence, and they only deliver during daylight hours on weekdays. An Amazon spokesperson who spoke with CNBC could not comment on the program beyond what's on the blog, so for now the future of the rollout remains murky. Whatever plans Amazon has for Scout, it's only natural to wonder what effect widespread adoption would have on the delivery jobs that are currently being performed by human beings. Do these workers need to brace themselves for the possibility that they may soon be obsolete? According to a 2018 report issued by the United States Postal Service's Office of the Inspector General, more Americans embrace the idea of robotic delivery than oppose it. Those who support it said robot delivery could offer greater flexibility to package recipients and reduce the risk of injury to delivery personnel. As far as the drawbacks, respondents cited job losses as a primary concern. However, postal delivery workers won't have to worry about being put out of jobs just yet. According to "Autonomous Mobile Robots and the Postal Service," a 2018 report issued by the United States Postal Service's Office of the Inspector General, the use of autonomous mobile robots for last-mile delivery of mail "is too economically and technologically immature to be scalable in the short term, especially for independent robot delivery applications."

A letter carrier holds Amazon.com packages while preparing a vehicle for deliveries at a United States Postal Service processing and distribution center in Washington, D.C. Andrew Harrer | Bloomberg | Getty Images

And Diana Dawson, vice president of consulting for the research firm Envirosell, said that job losses aren't the only problem to consider. "[The Scout] probably cannot negotiate the many variables that are involved in home delivery, such as steps, rain and customers who are not there when the robot opens its lid," she said. "This would likely lead to a delay in delivery, which is a pain point for Amazon shoppers in particular." Monica Eaton-Cardone is the owner and chief operating officer of the financial technology company Chargebacks911, which manages 200 million online transactions per month and has spent a lot of time studying delivery systems since the category can be rife for fraud. She said robot delivery faces several major hurdles. "A few years ago, a robot named HitchBOT was hitchhiking throughout different cities in an experiment to test human psychology," she said. "HitchBOT was beheaded in Philadelphia. ... Will we treat an Amazon robot any better?" Robotic delivery systems would also make it easier for consumers to say they never got a package and commit charge-back fraud than if the UPS guy made them sign for something. As far as benefits, Eaton-Cardone cited cost reductions on Amazon's part as well as a possible increase in delivery speed. She also said it might unexpectedly benefit infrastructure. "Companies like Amazon wield immense power, both economically and politically," she said. "Our politicians might not prioritize the rebuilding of our sidewalks and streets when only humans were using them, but I have a feeling it'll become much more of a priority when Amazon's robots need to use them too."

Industry-wide upheaval is inevitable, and a lot of good, hardworking men and women will lose their jobs. Monica Eaton-Cardone owner and chief operating officer of the financial technology company Chargebacks911