AR.. I believe this was a part of the new security package. The gov't wants more complete info for being able to pre screen passengers.
Believe it includes name, dob, residency, and country of origin.
It certainly would be handy for the cruise lines to store this info in a data base, but don't know if they can manage it. Heck... most can't keep track of how many cruises members of their repeaters clubs have taken <G>
No question E docs are coming. I believe RCI is already running some experimenting with them.