The famous genius Stephen Hawking, said at an interview with TechWorld that we should be careful because machines are able to submit us from here to a hundred years long.
He also claimed that we shouldn´t worry about who controls the technology but we should worry about the fact that if is it the technology controllable.
In my opinion, Hawking is overreacting about something not probable. I think it´s not a clever supposition but the world takes it in mind because of his previous achievements.