[xcambar]

That's a surprising statement to read. All your examples allow for statically significant unique identification (of a person).

I think that's where the threat actually lies. I'm equally worried about traces I leave with my Visa/MasterCard than those I leave with my uncovered face or fingerprints.

The main difference being that I can easily control the traces I leave with my cards, less so the traces I leave with my ohone, and it takes a significant effort to lkit traces from my face or fingers.