In 1900, there were no planes, no space travel. Motorcars were toys that enthusiasts played with, not useful means of transport. There were no computers, no radios, no antibiotics, no rockets, no nuclear power, no knowledge or understanding of the interior the atom, no very useful plastics.
In 1961 we had all of this stuff
Since 1961, what have we got?
The last man on the moon is getting pretty elderly. We have abandoned supersonic transport, and supersonic fighter planes are close to being abandoned.
Cell phones and the internet show radical improvement, but are just more intense and improved use of computers and radio, technologies that existed well before 1961. Genetic technology shows promise, but is not yet doing anything big. While reading genes continues to improve, writing them may well have peaked, and without vastly improved writing, gene technology is not going anywhere exciting. AI remains thirty years in the future, as it has been for the past sixty years, even though every desktop now contains more computing power than the human brain.
And, as I regularly point out