An example of the potential power of Apple's new Passbook for:Brands (here Dunkin Donuts) Platforms (here Facebook / Facebook Offers) Consumers (simplicity, speed)
Dunkin Donuts running a week-long promotion for their holiday bagel using Facebook Offers:
Upon acceptance, Facebook shares socially and then emails users steps for redemption:
Users then have to print the coupon (per below). But this could pass through to Passbook or into a Facebook Offers Book / application. Thus keeping everything mobile, eliminating friction, and adding tracking throughout the entire process: