“Hanke warns about the dangers of less than scrupulous actors taking advantage of the world of AR. ‘Think about a wearable device that’s with you all day long. If it’s on your head, it probably knows where you’re looking most of the time. Maybe it knows about other things too, like your heart rate. You see a product or an advertisement, what happened to you physiologically? Did your heart rate go up? What if you see a person? Maybe your glasses recognize that specific person. What does your heart rate do? Did your pupils dilate when you see another person. What about your emotions? We’re getting pretty good at predicting that too. Thing is, this is not science fiction. Tech can do what I just described right now.’”