I'm so happy you pointed this out, beacuse that's exactly what I was thinking :)

I thought you were being just a rosy eyed futurist, and I was already planning how to articulate an intuition about resource constraints eventually limiting technological innovation at some point...I never heard of Freeman Dyson but it sounds like you're alluding to some scholarly writings on just that point.

really, delightful reply. smiling out loud. tell me more about it sometime offline.