There's some percentage that I can't remember off the top of my head, but something along the lines of "75% of jobs that people have today didn't exist 50 years ago."

Imagine transporting yourself to 1970 and trying to explain what a social media manager does. Look at how many layers of tech you'd have to review to get there.

The same will happen. Some current jobs will stop existing, and new ones will emerge instead, as they always do.