There are those who think that automation and robotics are going to be a massive destroyer of jobs and others who think that in general humans respond to shifts in employment opportunities by creating new opportunities.
As I've noted more than once, in the 1970s (as it seemed that our jobs were disappearing, never to return), the correct answer to the question, "Where will the jobs come from?" was "I don't know, but they will." That was more a faith-based statement than a fact-based one, but whole new categories of jobs did in fact get created in the '80s and '90s.
However, a new Wall Street Journal poll finds that three out of four Americans think the next generation will be worse off than this generation.