This sort of thing is going to cause a huge chilling effect in the medium-term as it becomes more widespread. Every nuance of how you act or look is going to get collected by websites and cameras and used to make conclusions about who you are (accurate or not), potentially stored forever.

One can only imagine how China will use these approaches with their planned 570M cameras with facial recognition.

edit: number of cameras was an order of magnitude low, corrected based on: https://www.businessinsider.com/china-facial-recognition-tec...