I think most people don't feel the same as you about whether someone knows where they are. In most cases carrying a mobile phone and the presence of a CCTV camera makes them feel safer (and indeed actually makes them safer, if e.g. the CCTV camera deters crime).
Therefore, I think most people who actually buy their insurance will not see this latest idea as an invasion of privacy or a loss of freedom.
Your hypothetical "endgame" face camera actually is just an automatic version of people watching the current CCTV footage. However, I find it less easy to imagine a popular and enforceable ban against wearing sunglasses or wrapping up against the cold.
Would you consent to every child born in the future being fitted with a tracking device-implanted near a vital structure that would make it's removal dangerous if not impossible.
If not- why not?