I wonder how paperless passports would work for folks with multiple passports.
The current experiments seem to be fractured across governments and I would be very surprised to see a centralized system (as your response seems to imply) come into play until well after various governments introduce their own digital systems.
Ok so it's not a passport. What is being described by the article are just national identities based on physical cards. Estonia has been doing that for a very long time as well.
Without a paper passport I’m not sure how that would work. They could code it to another piece of identity I guess (like your ID card), but there would still be something unless biometrics become advanced enough.
Everyone is quite keen on maintaining sovereignty on matters like this aside from tightly integrated blocs like EU