Hans Moravec at McCarthy's lab in roughly this timeframe (the 70s) wrote about this then -- you can find the seed of his 80s/90s books in text files in the SAIL archive https://saildart.org/HPM (I'm not going to look for them again). Easier to find: https://web.archive.org/web/20060615031852/http://transhuman...
(Same McCarthy as in this debate.)
Gordon Moore made up Moore's Law in 1965 and reaffirmed it in 1975.