Scott McNulty flies across country using the new Passbook app in iOS 6:
It seems to me that Passbook is a clever idea, but honestly having my eTicket with the QR code emailed to me (or just using the one displayed in the United app) would have been simpler. Once you get the ticket into Passbook it is a nice experience, but adding stuff to Passbook isn’t intuitive.
Looks like the people at Apple will be working overtime on what iOS 6.1 will be.