Based on the author's misunderstanding of AI, it has not "arrived" and probably never will.
If in the future, authors of such opinions would just let this simple concept sink in first -- that in machine learning application behavior is deduced from data rather than from fixed rules, but that in both cases the boundaries are set by humans -- we'd all be better off because their wild Skynet takes would never see the light of day.
As usual, I am more worried about the humans than the machines.