This is the lump of labor fallacy.
It's not about "what jobs will be left", it's about the new jobs we'll invent with all the time we'll have on our hands.
There was never a fixed number of jobs, there's a fixed number of workers.
I didn't think you understand. We aren't about to automate all things humans can "currently" do. We are about to automate everything that separates us from a brick. What can possibly be left, and why would an unemployed person pay for whatever what is left?
The nature of the jobs change too though. Do you believe jobs will become more or less skilled/autonomous and connect people more or less with their fellow man? Some of us are pessimistic about those questions.