back to BDC?

While playing with Longhorn Server build 5728 I ran into the following tab of a user:

This sounds like a good idea when you have a lot of small offices in your company where you not always know if the room the server (i.e. the DC) is in a locked room. when stolen and/or hacked the only passwords available will be the ones cached and these will be (if the admin is clever) only user passwords.