Doug Engelbart, a pioneer of the personal computer, would love your point about computers being extensions of our brains. His mission (in the 1950s!) was to find a way to 'augment human intellect' through technology, much like the biologist augments their eyesight through the microscope. The mind blowing part is that they didn't have anything to go off (or XEROX to copy) - imagine conceptualizing the personal computer decades before it hit the mainstream. Sorry for the rant!
You might enjoy reading E.M. Forster's "The Machine Stops"[1][2][3], which in 1909 predicted something like the internet, internet addiction and withdrawal, chat rooms, video conferencing, online learning, widespread international air travel.
https://www.dougengelbart.org/content/view/155/87/