Which retail design innovation has most significantly transformed airport concourses in the last decade, leading to reported 30%+ increases in per-passenger spending?

The transportation industry has seen remarkable retail innovations at transit hubs over the past decade. Airports, train stations, and other transportation centers have transformed from mere travel points to sophisticated retail environments. This poll tests your knowledge of how transportation retail spaces have evolved to enhance customer experience while maximizing revenue opportunities in these unique high-traffic environments.

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Walk-through duty-free layouts that force passengers through retail zones
The 'street pricing' model guaranteeing same prices as local non-airport stores
Neighborhood-based terminal designs that mimic local city districts
Self-checkout kiosks with mobile app integration for delayed pickup