Apple Passbook: Is it Ready for Prime Time?

Scarcity of Apps in Popular Loyalty Categories
The most popular categories for loyalty programs are airlines, apparel and shoes, gas, health care, and hotels. Passbook has made nice traction with the airlines, but it's a diverse mix of supported apps — American Airlines, Barnes & Noble, Bon-Ton, Live Nation, MLB.com at Bat, Sweet Tomatoes and Walgreens — that are lacking in other common categories. This means it's still far away from digitizing my (and likely the majority of consumers) physical wallet.