I admire the human belief that the improvement of technology and our living standards will be infinite. It will be a bitter moment if we finally realize the plateau we've been stuck on is not temporary and all future gains will be marginal.
And it even might be a rather short (in length, not height) peak we won't ever reach again. Nowadays I don't see a single reason to believe that children won't be put back to work in western societies in 200 years, unless massive hypothetical innovations are made to replace depleting oil and keep the very high productivity per capita we've been enjoying for decades.
How can you think this in a world where AI is making miracles happen?