Most people are missing the fact that your passport in the drawer doesn't know where you are.
Once everyone is mandated to carry digital ID, then possibilities to track population open up.
Once everyone is mandated to carry digital ID, then possibilities to track population open up.
[1] to paraphrase one many excellent John McCarthy-isms: http://jmc.stanford.edu/general/sayings.html
Digital ID doesn't have to report your location either, depending on the implementation. It's not like it's a given a digital ID system has to give your location.
An SSH key is a digital ID. Does it report your location when you use it? A GPG key can be a digital ID. Does it report your location when you sign something?