The next paradigm for ultra-fast grocery delivery is more choice—without decimating brick-and-mortar stores, Uber's grocery boss says

Susan Anderson standing in a corridor (Credit: Brendon Thorne—Getty Images)

It feels like ancient history when groceries were only purchased at physical stores. 

Over the years, as the number of apps bringing eggs and apples to your doorstep has proliferated, the waiting time for delivery has shrunk from days to a few hours (if not minutes).