One thing a computer can not do it is take on physical form. It can not yet can build or plumb or connect water with humans setting it up or bring it raw material to build from. Not yet. Robotics are way behind robots building robots that can build house, do electrical installations etc.
The immediate threat is asking AI some of OUR unsolvable puzzles.
How do I stop global warming? ( what is the route cause of global warming?)
How do I stop my enemy state winning this war?
How do I become the biggest super power?
Can you make HN15 jump the species barrier?
Can you design me a mass bio weapon?
Or even the dumb things like how do i take possession of Greenland? How do I remove the things that stand in my way to reach my goal?
Some of those answers is get rid of people.
Take my first question. First question. It's the answer that you might never jump too as you want to stop global warming to protect the human race, but it's the logical solution to that issue. Great when you have no empathy and you can break your primary rules.
Now I'm.feeling paranoid!