If you've done nothing wrong you've got nothing to hide, right?

Personally I see no worthwhile reason the state should be able to track the location of every person at any time. Phones make this bad enough, but at least that's warrant required and requires active intervention. Passive tracking of everybodies actions through total camera surveillance is a brutal thought, no?

No, actually it's more than that.

While your premise is true, it's also true that if I have done something wrong then I have no problem being called out and brought to justice on those merits.

Someone who is doing wrong hopes to be disciplined. Many criminals secretly just hope to be caught so they can stop doing wrong. It seems nearly absurd that criminals who "have something to hide" continually just cover up more and more and act covertly, as if they could never be found out.

If I did something in public that was so egregious that a camera recorded me and it could be used as evidence against me, I hope that it would.

Likewise, if I were involved in any dispute or crime, as a witness or victim, and there were surveillance that indicated my role was innocence, bystander, or victimhood, I would hope that the evidence showed that as well.

I don't have any illusions, in the face of corruption and oppression, that surveillance will be entirely fair, but it can be widespread and equally applied, and it's only through its ubiquitousness that it will be ultimately effective.