But increasingly, they were becoming interfaces to an information system that spanned entire cities.… By the summer of 2026, the outskirts of Yokohama had become a living laboratory of retail evolution. On a humid Saturday afternoon, urban commerce analyst Kenji Sato stood on the rooftop of a logistics hub overlooking a sprawling commercial district. From there, he could see three generations of retail history operating simultaneously. Near the old train station stood a narrow shopping street. The area had survived decades of economic change. Family-owned stores sold everything from kitchen knives and handmade stationery to imported coffee beans and repair parts for obsolete appliances. Many shops had existed for more than fifty years. A few kilometers away, brightly lit convenience stores lined major roads. Autonomous delivery robots moved in and out of their back entrances every few minutes. AI systems continuously adju...