The title is hyperbolic. You still do need a passport and there's no such thing as a digital passport. You need to register your document at some point, so that one is what you will use. Using a different passport would mean logging in and changing your data; your user will be unchanged.
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.
It's not even future, it's rolled out in Ukraine to millions of people and it uses silly face id over the camera to authenticate you for remote things. You can't cross borders with it, as it requires amending the treaties, but otherwise it's a thing.
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.
