Which IoT-enabled architectural feature has proven most effective in improving retail customer flow patterns and engagement in large-scale commercial buildings?

The integration of IoT (Internet of Things) technologies has revolutionized modern architecture, enabling buildings to become more responsive, efficient, and interactive with their occupants. This trivia question focuses on how retail spaces specifically leverage these smart technologies to enhance customer experience while maintaining architectural integrity. Test your knowledge about the intersection of architecture, retail design, and cutting-edge IoT applications.

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Smart lighting systems that adjust based on customer density and movement patterns
Facial recognition entry systems that personalize shopping experiences
Augmented reality windows that transform based on passing foot traffic
Pressure-sensitive flooring that tracks customer movement and generates heat maps