Getting back to the rise of the machines... there are also the issues that will surround intelligent agents. Granted our exposure so far has been to the likes of siri or google's whatever and alexa, etc. but eventually, everyone could have one or more intelligent agents running at home. Agents on the order of IBM's Watson and many times more powerful.
While there would be advantages, like a tutor for the kids or a useful personal assistant, there is also the great potential for harm. It would be possible that the machines (IA) turn against us but perhaps the agents turn against themselves. We are then stuck in the middle of an AI war.
I can't help but thinking about the self-driving cars. Given a certain set of circumstances, a self driving car could make the decision that it is your time to die. I'm not saying it would be malicious (not yet anyway) but through the decision tree it might think that driving you off a cliff is preferable to the other scenarios. That kinda haunts me.