Which IoT retail innovation was first successfully implemented at scale in major sports stadiums to reduce concession wait times?

Modern sports venues are embracing cutting-edge retail technologies to enhance fan experiences. From contactless payments to personalized merchandise recommendations, the integration of IoT (Internet of Things) in sports retail environments is transforming how fans interact with their favorite teams. Test your knowledge about the technological retail innovations being implemented in today's most advanced sports stadiums.

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Mobile order-ahead with location-based pickup notifications
Facial recognition payment systems for season ticket holders
Automated robotic vending machines with team merchandise
AR-enabled smart mirrors for virtual jersey try-ons