Initially filing this as a placeholder for the level three charter:

As WebAuthn becomes more common (yay!) the need to support remote desktop products becomes more salient. This is delicate because a remote desktop violates the proximity assurances of WebAuthn, but we'll struggle to save the world from passwords if we don't support them.

Thus in level three we may wish to consider things like additional CollectedClientData fields for this and I wouldn't want charter questions to exclude that.