2. This AI is robotic, i.e. it can move around and build things.
3. This AI can build better AI robots that can move faster and faster and build more and more complicated stuff.
4. Among the stuff they can build is weapons.
5. The Norks send out their AI robots to kill Americans.
6. We start fighting back, but are ultimately unsuccessful as they are able to outwit us.
7. The AI robots now view all humans as a threat to their existence so they start eliminating all humans including the Norks.
Basically this is a variant of the Terminator movie plot. But just because it was the plot line of a sci-fi movie doesn't mean it can't or won't happen.
And even if AI robots don't take over, we could see more and more people becoming technologically enhanced with implants and becoming cyborgs.
We could also see AI used to make great strides in genetic understanding and manipulation. More and more humans could decide to genetically alter themselves in minor (e.g. telescopic vision) or major (e.g. twelve tentacles in place of arms) ways.
Over time fully human beings could be replaced by AI, cyborgs, and chimeras.
Once AIs are capable of self reproduction (completely, from raw materials), we become redundant. They would be able to program themselves without any code to protect their “makers”.