I think there must be something there considering Samsung has decided to copy it - WITHOUT NFC no less....
I personally use Passbook plenty and eagerly await more uses....Best Buy for one needs to get all over this....their rewards program is the ideal situation for the way passbook is currently configured.
I use AA boarding passes and my AAdvantage card for work travel, Starbucks for my drinks and to keep track of my balance, fandango for movie tickets, target gives me coupons, and Walgreens for rewards points.
Ever since Starbucks fixed their app, the location reminders work great and are quite accurate.
Can't wait to be able to get my Rangers' season tickets digitally as well so I can save the paper copies....like to have them saved in case I witness something historic!