Computers may not have changed the look of the world too much, but they have had an extraordinary impact on the experience of being human. If people are now spending 50% of their time on screens, its in some sense equivalent to the world looking 50% different, right?

Couldn't you take that to at least 1979 as well?

Or possible 1969?

It's pretty much the hypothesis of the book 'The Great Stagnation'

https://en.wikipedia.org/wiki/The_Great_Stagnation

Cars have changed a lot too. Less boxy these days.