Reading this announcement, the idea seems to be that FIDO keys will be synchronised across devices. That means you can lose your phone and still get access to your accounts from your desktop.
You might even be able to get access by simply logging in to your Microsoft/Apple/Google account on a new device if they implement this system stupidly enough.
You might even be able to get access by simply logging in to your Microsoft/Apple/Google account on a new device if they implement this system stupidly enough.