Artificial Intelligence actually...but "Robots" has more flex to it...
Elon talking about it:

“I have exposure to the very cutting edge AI, and I think people should be really concerned about it,” Musk told attendees at the National Governors Association Summer Meeting on Saturday. “I keep sounding the alarm bell, but until people see robots going down the street killing people, they don’t know how to react, because it seems so ethereal.”




"Get ready....for your blessing....."