Yesterday Amazon confirmed what buyers have been showing us for years: screens didn’t replace stores, but exposed what stores still do best. For a decade, “digital-first” was treated like destiny. Online was destined to win. Physical would fade. Stores would either become showrooms or disappear. Then yesterday Amazon announced its largest retail store ever: a 230,000-square-foot big-box location outside Chicago. Half retail, half fulfillment. Two separate entrances, two separate jobs. Why a...