Isn't the main point here that we can sustain growth without actually 'working'? Is that due our definition of 'work' being flawed in that is not actually tied to the real value of an economy or because we are approaching post scarcity?

If the first was true millions would slave away every day without producing anything of value at all and what we see now is just a society telling everybody that you simply 'ought to have a job'.

In the second case we should worry about how to make such a society actually work (distribute its wealth better).