All this facial recognition technology that is popping up as breaking news was on demonstration in the Microsoft visitor center 10 fricken years ago. Over a decade ago they could already assign an ID to a person the first time they were seen, accurately estimate their height, weight, ethnicity, age, and even mood, and create a persistent profile for them across locations. That was a decade ago when they had it on display for visitors, so it had actually been available for much longer. Imagine what they're doing now.