Ex machina is mythical and the most relevant thing about it is that it was more than 10 years ago. At that time one saw AI as something far away and look where we are. It's like you say, it's neither good nor bad depending on how it's used. I do believe that as time goes by we will see how robots and humanoids will gradually replace humans in certain tasks, in several countries it is already happening. And well, everyone's fear is that what happened in the movies will happen, that these AI will create consciousness and become self-sufficient.