Which retail technology innovation was FIRST widely adopted by major league sports stadiums to enhance the shopping experience?

The sports retail landscape is rapidly evolving with technology transforming the fan experience in modern stadiums. From contactless payments to personalized merchandise, sports venues are becoming retail innovation hubs. Test your knowledge about the cutting-edge retail technologies being implemented in major sports venues around the world. How well do you understand the intersection of sports business, retail innovation, and fan engagement?

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Mobile point-of-sale systems that allow staff to process purchases anywhere in the venue
RFID-enabled "grab and go" stores where fans can take items and be automatically charged without checkout
Augmented reality mirrors that let fans virtually try on team merchandise before purchasing
Biometric payment systems that allow fans to pay for merchandise using facial recognition