[isostatic]

In the UK I suspect this is already in place and will become more and more accurate as time goes on. That's inevitable. What concerns me is that in the US it won't be the government doing it, but it will be private companies, targetted adverts will appear as you walk past billboards (Facebook Shadow profile 12491123 is approaching billboard 9874, switch to hemorrhoid cream advert)

[shubb]

I think the US already has big private networks of number plate recognition cameras that sell feeds to cops, bounty hunters, advertisers, and traffic alert companies. It wouldn't be much of a hop.

[John_KZ]

I can't remember the name of the project, but at least NY is full of CCTVs that record and index everything (ie tracking the position of cars, pedestrians all with searchable characteristics ie colors, car models, biometrics etc). But I haven't heard about "retail" data sales or any data sales/private sector services in general.

[shubb]

Example company. I think they are a data agregator for smaller local private sector networks. https://www.tlo.com/