My money is on it ending with the automation of propaganda and con artistry at scale.
A small group of people could use AI and social media to virtually sit down with every single person and convince them of something using a detailed micro targeting profile. It would be like diapatching an individual evangelist to work on each of a billion people in parallel.
We saw very primitive and still largely manual versions of this in 2016. When the real thing arrives it will be the hydrogen bomb of persuasion.
This is also what I think an "AI takeover" would look like. Forget about terminators. A superintelligence would find us trivial to con and manipulate. We will just be convinced to do what the AI wants. Skynet will launch words not bombs, but much like the nukes in the Terminator story we are building the infrastructure of our own destruction ahead of time.
