Which transportation company first introduced fully automated, unstaffed retail stores using computer vision and AI at their stations/hubs in 2018?

The transportation industry has seen remarkable retail innovations that changed how passengers shop while traveling. From in-flight shopping catalogs to high-speed rail retail experiences, transportation hubs have become important retail touchpoints. This poll tests your knowledge about a groundbreaking retail innovation that transformed the passenger shopping experience in the transportation sector.

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Amazon (at select airport locations)
JR East (Japanese Railway) with their 'Touch-and-Go' stations
Grab (in Singapore's Changi Airport)
Deutsche Bahn with their 'BahnShop 4.0' concept