Once robotz are better at driving, running, getting over obstacles and thinking than humans, it might be pretty scary if someone sends a swarm of relentless robots after you. And of course they'd be be far stronger and equipped with ways to easily incapacitate you.

Then we'd have AI that can subvert human systems that until now relied on adversaries not continuously optimizing and taking advantage of loopholes and building on previous results at lightning speed. Privacy, for instance, is easily circumvented by any algorithm that has access to an array of methods. It is also easy to have a virus take advantage of basic vulnerabilities of your typical web setup (eg Wordpress) and set up a botnet real fast. But beyond that, voting, trust between friends, reputation, and our laws themselves can all be subverted by an algorithm designed to achieve a certain outcome.

In short, it seems the future would consist of the equivalent of everyone having a nuke with which they can wreak havoc at any time.