Firstly no AI that runs on a computer with current binary arithmetic and traditional programming is capable of thinking for itself and the main danger to us is not whether they decide to do something against us, but whether the programmer has programmed it to unless there's a fault and things go haywire, this could also be a programming error. This traditional technology alone will never be like in the
Terminator movies.
Where AI gets really interesting is when they start modelling the neurons of brains and then emulate them on a computer, they have already been emulating part of a bee's brain to fly drones since 2015, the drone acts exactly like a bee's brain because it works the same and it even shows behaviour of the honey bee (see 1st video below), in fact if they emulated the entire brain which they intend to do it would arguably be a bee in every way as far as the brain was concerned, but they could modify it and connect it to what they like. Since the bee population is reduced they could potentially create artificial bees, perhaps even "better" than real bees to pollinate crops. This is quite frightening because it obviously won't stop there and eventually in years to come they could be emulating more complex brains and in many years perhaps even a human, then there will be a question as to what is the difference? Would an artificial human brain have a soul for instance?
Quadcopter drone successful flown by a digital bee brain:
The above is emulating a brain using traditional computer technology, but there is the potential to create a neural network in other ways too and this could be even more potentially dangerous because it could have a mind of it's own and perhaps even turn against us, for instance some scientists have already grown rat neurons on a computer chip in order to fly a simulated aircraft, this gives AI a completely new dimension and it's only partly artificial (see 2nd video below). They have also grown neurons to control various machines and they can even learn like a brain, because it is brain matter, but there are obviously very serious ethical questions because will the grown brain matter ever become conscious and have a soul? Eventually who knows they could be testing with human brain neurons if they're not already, it would probably be outlawed in many countries, but it's unlikely to stop it from going on behind closed doors.
Rat Neurons grown on a computer chip fly a simulated aircraft:
(Sorry about the poor quality.)
Lastly it's in my opinion extremely cruel and I don't agree with it, but scientists have also learned how to control rats using remote control with an attachment to the brain, I won't show that video because to me it's horrid, but computers could be integrated into existing brains to control machines in future too, although this is again only partly artificial. There is a potential for cyborg machines in the future.