Which retail IoT innovation was first implemented by Amazon in their Amazon Go stores, allowing customers to shop without traditional checkout?

The Internet of Things (IoT) is transforming retail environments into data-rich, responsive spaces that enhance customer experiences and operational efficiency. From smart shelves that monitor inventory in real-time to heat mapping that tracks customer movement patterns, IoT technology is creating the 'connected store' of the future. How well do you understand the cutting-edge IoT innovations reshaping the retail landscape? Test your knowledge about a groundbreaking retail IoT technology that's changing how stores track products and interact with customers.

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Just Walk Out technology (using computer vision, sensor fusion, and deep learning)
RFID-enabled shopping carts that automatically scan items
Blockchain-based digital receipts system
Facial recognition payment terminals