Membership card in Passbook, please!

This App is useful especially because boarding passes can be stored in Passbook. It would be really nice if MileagePlus membership card could also be stored in Passbook. It then should be able to reflect the status change almost immediately. In fact, Delta now has installed this function in their App after the latest update. I really hope UA will follow.

ぱろぱろ about United Airlines, v2.0.10