In August 1997 Skynet went live and, after the ensuing nuclear conflagration, legions of Terminators (with obligatory evil red eyes) hunted down the surviving scraps of humanity.
Stephen Hawking added a more authoritative voice with the equally dire: "Once humans develop artificial intelligence, it would take off on its own and redesign itself at an ever-increasing rate." While Skynet realised that humans were the enemy that should be destroyed, Hawking's concerns were less violent.
While automation opens up new employment possibilities, history shows that businesses will replace humans with technology wherever it can.