What pioneering retail technology did Amazon first introduce in its Amazon Go stores that eliminated traditional checkout lines?

Amazon revolutionized retail with numerous innovations, but one particular technology dramatically changed how physical stores operate. This innovation reduced checkout times, decreased labor costs, and created a new shopping experience that many retailers are now trying to replicate. Test your knowledge of this game-changing retail technology that has reshaped the industry landscape and customer expectations for in-store shopping experiences.

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