The future where only some people need to work will literally never come. It relies on the premise that the ownership class will give up ownership. They will not.

The machines that increase the productivity and reduce the need for manual labor will just increase profit for the owner/shareholders. Increases in productivity mean ABSOLUTELY NOTHING for the common person. You already hear this argument now in the form of “I took the risk and put up capital to run the business so I deserve the lions share of profits.” That argument will just become “I put forward the capital to buy the machines that produce the products, why do you deserve any of it!?”