There's lots of tech that comes along that takes forever to be fully implemented. Autonomous car tech already works in prototypes but there's a million things that will keep it from going live anytime soon.
As for transportation companies like UPS implementing autonomy, that is likely decades off. Think about it, a good portion of our fleet are nearly 30 year old dinasours that don't even have power steering. Half our fleet don't even have automatic transmissions. When were these two technologies invented? 1920's. So after 100 years, many of us still don't have it.
How about those hybrid package cars you sometimes see in print? The vast majority of us will never see it. Hybrid tech is 20 years old. Point is, even if it's possible, doesn't mean it happens. Often times, it's the massive upfront investment of replacing equipment that still works.
Don't be alarmed, we aren't being replaced by androids anytime soon. Even if they could build an android that can do anything we can in 20 years, it would take UPS many years after that to use them.