Many cities already have industrial cameras installed on the streets and inside public transport (buses, trams, subway), as a way to prevent crime.
Until recently the issue was that no one had technical and financial resources to analyze the data, except on court warrant, but once Big Data and computer vision technologies become cheap enough someone will definitely use that as real time surveillance tool.
Well there was white bear which was more of a philosophical debate and then there was Most Hated in the Nation which I think really hits home the development of small new technologies such as cameras and the consequences of keeping their power and security unchecked.
There was also The Entire History of You - where everything you see is recorded and can be played back at any time - leading us to hyper-focus on details from the past rather than experiencing the present.
- Super cheap and gigantic capacity storage.
- Wireless network like 5G.
- Wireless charging.
- Nano cameras.
I think there was a Black Mirror episode about this.