7T is actually possible, but yes it's huge.
IMO HN should have an edit indicator, at least after others have already replied.
If (the best) AI adds 10% to that, $7T is not only possible but a bargain.
https://en.wikipedia.org/wiki/List_of_countries_by_GDP_(nomi...
Watt couldn't have asked, his engines specifically weren't enough of a difference by themselves even though the revolution as a whole was, and I strongly suspect this is also going to be true for any single AI developer; however a $7T investment in many unrelated chip factories owned by different people and invested over a decade, is something I can believe happening.
It's only 2x the AAPL market cap.
However, the OP was incorrect, it's 2x the AAPL market cap.