It's not "when". It's still very much "if". That's why we're having this dialog now, before it comes to pass. You're acting as if it's a foregone conclusion that there are going to be recording devices in every square inch of society. Even if we have such technological capability, we really ought to be asking "why?".
To me it is a forgone conclusion, yes, and I don't think anything is going to stop it. Why? History, virtual time travel, truth, protection, sharing information ... lots of reasons why. You need the data before you can even know the full benefits that knowledge that data will bring. And consequences.