The article is speculating about the future based on current trends, so of course there is not yet a digital passport.
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.
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.