Which AI-powered retail innovation was first implemented by Amazon in their Amazon Go stores, revolutionizing the checkout process?

Artificial Intelligence is rapidly changing how retailers operate and compete in today's market. From personalized recommendations to inventory management, AI applications are becoming increasingly sophisticated and widespread. This trivia question tests your knowledge about a significant AI implementation that has changed the retail landscape. How familiar are you with the cutting-edge technologies reshaping the shopping experience?

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Just Walk Out technology (computer vision and sensor fusion that automatically detects when products are taken from shelves)
Smart shopping carts with built-in scanners and payment processing
Facial recognition payment systems that charge customers upon store exit
RFID-based inventory tracking that automatically processes purchases via smartphone