Idiot, yes. Blowhard, yes. Wrong about Moore's Law being an infinite exponential and not an S-Curve, yes.
Also right about how surprisingly quickly some things can come to pass. Looking at human history from 5000 years ago until 250 years ago, the progress of the last 100 years would have been unimaginable. Literally, stories like Jules Verne didn't start to appear until things like steam engines were running around.
When self improving AI does emerge, some things could be changing very rapidly - Hollywood movie overnight kind of rapidly. Or we might just plod along for another 5000 years making incremental improvements and minor discoveries.