> The pace of technological development has always been permanently increasing.

Not in the same way though. The pace of technological development post-industrial-revolution increased a lot faster - technological development was exponential both before and after, but it went from exponential with a doubling time of maybe a century, to a Moore's law style regime where the doubling time is a couple of years. Arguably the development of agriculture was a similar phase change. So the point is to imagine another phase change on the same scale.