I agree AI is heading this way and humanity needs to stand against it now!
Take drones for example they are used to desensitise people from murder turning it into a computer game. This is now common practice, think of the next steps. We need to start thinking about these actions and actively trying to stop them, if we stand aside and watch it will seen be too late. Musk is spot on here, hes a forward thinker who shoul be listened too :)