What architectural innovation did Apple introduce with its Fifth Avenue NYC store that has since been widely imitated in retail design?

Apple's flagship store on Fifth Avenue in New York City revolutionized retail architecture when it opened in 2006. The minimalist glass cube entrance became an architectural icon and changed how brands approach physical retail spaces. This poll tests your knowledge of this influential architectural product innovation that blurred the lines between brand identity, retail design, and urban landmark.

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The glass cube entrance structure that serves as a skylight for an underground retail space
A floating mezzanine system supported by hidden tension cables to create the illusion of hovering display platforms
Transparent OLED display walls that change from opaque to transparent based on customer proximity
Kinetic façade elements that automatically adjust throughout the day to optimize natural lighting conditions