I imagine if cameras and IoT devices continue to miniaturize, one day they'll float on the wind like a dandelion puff. Folks could spread them around like dust. Helicopters could crop-dust them over entire cities.
In future we'll have to come up with some social rules about ubiquitous surveillance. Because it will become the norm.
Doesn't seem there's any possible way to avoid that scenario.
Sure we can still have privacy. I hear what goes on behind a bathroom door, but I pretend I don't. It would be the height of boorishness to say anything. Similarly, to admit you know anything about someone you learned from 'remote viewing' could be appalling manners etc.
People are very adaptable. Come from a line of people who lived in tiny villages and knew everybody's business. And yet here we are.
In future we'll have to come up with some social rules about ubiquitous surveillance. Because it will become the norm.