Great book.

But if you want some even earlier forward-thinking stuff, look up Forster's "The Machine Stops." It's not a full book, more a novella if it's even that. Extremely prescient!

And of course if you haven't read the relevant portions of Butler's "Erewhon," it's remarkable how closely they map onto today's issues. He kind of takes Thoreau's "Lo, men have become the tools of their tools" a few more stops down the line.