Which IoT innovation has NOT yet been widely implemented in major sports stadiums as of 2023?

Modern sports venues are increasingly adopting Internet of Things (IoT) technology to enhance fan experiences, improve operations, and create new revenue streams. From connected seating to smart turnstiles, these technologies are changing how sports venues function and how fans interact with their favorite teams and events. Test your knowledge about the cutting-edge IoT implementations in today's sports venues!

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Biometric ticketing systems that use facial recognition for stadium entry
AI-powered cameras that track player movements and generate real-time performance analytics
Holographic player projections that allow fans to interact with virtual athletes in concourse areas
Smart seats with integrated mobile charging and concession ordering capabilities