Silly ....
They're here ... just called illegals, that's all.
1968 really didn't expect to be invaded, we were supposed to be the vangard in futuramazations.
“Besides school lessons, other educational material is available for TV viewing. You simply press a combination of buttons and the pages flash on your home screen. The world’s PORN is available to you almost instantaneously.”
Had this one word been changed, the author would have hit this prediction out of the park.