5. Facial Recognition Software
In the near future, you could access strangers’ contact information, medical/criminal records and social media profiles just by gawping at their mug, via wearable tech like Google Glass.
Theoretically, this’d also allow you to rank potential partners by facial symmetry, estrogen/testosterone levels, BMI, and other classic indicators of attraction.
This would kick natural selection into overdrive, inevitably creating a race of Arnold Schwarzeneggers. Get to the chopper!!