COULD AI replace 100 million jobs in the next 10 years? Perhaps. WILL it? Not very likely. AI still falls down pretty regularly. That said, it's not AI that's going to eliminate those jobs; it's management that will. The moment they THINK AI can do the job they'll get rid of those expensive pesky humans and replace them with AI. In many cases they'll learn that the AI isn't ready yet, but at that point it may be too late to re-hire the humans to come back and fix it.
But capitalism rewards lower costs, not higher payrolls, especially in publicly traded companies.
In the next 100 years, sure, I might buy that it will be ready to significantly displace workers by then.
Will there be new jobs cropping up for people to do? Hard to say, previous automation tended to replace physical effort more than mental effort and creativity. I'll grant that there may be new jobs I'm not thinking of yet, but I'm not as optimistic as people who hand-wave and say "The old telephone operators found new kinds of work."
We're probably getting closer to needing to seriously talk about universal basic income, but...how do we fund that if we have a shrinking workforce and ever consolidated wealth?