Which retail innovation has most significantly reduced average transaction times at high-traffic transportation hubs since 2020?

The transportation industry is constantly evolving its retail experiences to meet changing consumer demands. From airport shopping plazas to train station convenience stores, transportation hubs have become important retail innovation centers. This trivia question tests your knowledge about a significant recent retail innovation that has transformed how travelers shop while in transit. How well do you understand the cutting-edge developments in transportation retail spaces?

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RFID-enabled just-walk-out technology that automatically charges customers as they exit with merchandise
Holographic product displays that allow travelers to visualize products without physical inventory
Drone delivery services that transport purchases directly to waiting vehicles or designated pickup points
Subscription-based retail models where travelers pre-select items before arrival for immediate collection