Which architectural innovation did Apple introduce in their flagship stores that has since been widely copied across retail design?

The intersection of architecture and retail has transformed shopping experiences worldwide. From department stores to flagship boutiques, architectural innovation has shaped consumer behavior and brand identity. This trivia question explores a groundbreaking retail design that changed how we think about shopping spaces. Test your knowledge of iconic retail architecture that has influenced the industry.

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The floating glass staircase design, first introduced in the SoHo store in 2002
The underground retail concept with glass pyramid entrance, inspired by the Louvre
The open-air marketplace design with retractable roof panels for natural lighting
The vertical garden living walls integrated into the store's structural support system