Which AI-powered retail innovation was first successfully implemented at scale by Amazon, revolutionizing inventory management in 2012?

Artificial intelligence has dramatically transformed the retail landscape over the past decade. From inventory management to customer service, AI applications have revolutionized how businesses operate and engage with consumers. This trivia question focuses on a pivotal moment in retail AI history that changed the industry's trajectory and set new standards for technological integration in the shopping experience.

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Amazon Go's 'Just Walk Out' cashierless technology
Kiva robotics systems (now Amazon Robotics) for automated warehouse fulfillment
Alexa-powered shopping assistants in physical stores
Dynamic pricing algorithms that adjust prices in real-time based on demand