Not to take anything away from John Brunner's 1975 classic, but EM Forster's The Machine Stops[1][2] was even more prescient.
Written in 1909, it predicted (in very rough, general form) something like the Internet, Internet addiction, video chat rooms, and virtual reality.
He also wrote another short story which I consider to be even better than The Machine Stops. It's called The Other Side of the Hedge[3], and while it's not as prescient it's one of my favorite short stories and I would highly recommend it to everyone.
[1] - https://en.wikipedia.org/wiki/The_Machine_Stops
[2] - https://www.ele.uri.edu/faculty/vetter/Other-stuff/The-Machi...