Which architectural innovation was pioneered by Apple Stores that has since been widely adopted across luxury retail?

The intersection of retail and architecture has evolved dramatically over the past decades. From the earliest department stores to today's experiential flagship locations, architects have played a crucial role in shaping how consumers interact with brands in physical spaces. This trivia question explores an innovative retail strategy that revolutionized architectural approaches to store design. Test your knowledge about how architectural innovation has transformed the retail landscape!

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The floating glass staircase design that serves as both functional element and visual centerpiece
Exterior facades made entirely of digital screens that change displays throughout the day
Underground shopping tunnels connecting multiple brand locations in urban centers
Rooftop retail gardens that combine shopping with sustainable green spaces