Tired of comparisons to the much flashier internet, supermarkets are working hard to ditch their unsexy descriptor: big-box stores. These days you’ll find a Murray’s Cheese outpost in Kroger, a kombucha bar at Whole Foods and poke bowl counter at Albertsons. All these flashy foodie options are good distractions from what’s happening under the hood, which is that grocery stores — the physical four walls — are going digital.