Which company launched the first major cashierless retail store concept called 'Just Walk Out' technology, allowing customers to shop without going through a checkout line?

The retail landscape is rapidly evolving with technological innovations reshaping how consumers shop. One of the most significant recent developments has been the introduction of cashierless stores, where advanced technologies like computer vision, sensor fusion, and deep learning eliminate the need for traditional checkout processes. Test your knowledge about this retail innovation that's transforming the industry and challenging traditional retail operations.

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Amazon (with Amazon Go stores)
Walmart (with Walmart Scan & Go)
Target (with Target Express)
Alibaba (with Hema stores)