Besides saving some plastic, the Passbook entry adds some worth through geofencing that reminds recipients to splurge if they're near one of Apple's steel-and-glass stores.

ENGADGET: Apple starts offering Passbook-enabled gift cards, may save our hides in holiday shopping

Now consider the myriad digital tech options we have at our fingertips: geofencing, social integration, digital coupons, crowdsourcing, crowdfunding, near field communication, GPS, location-based applications, real-time bidding and the Internet of all things.

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