“Would you like to sign in with your palm?”That was the question a cheerful Amazon employee posed when greeting me last week at the opening of a Whole Foods Market in Washington’s Glover Park neighborhood. She blithely added, “You can also begin shopping by scanning the QR code in your Amazon app.”“Let’s go for the palm,” I said.In less than a minute, I scanned both hands on a kiosk and linked them to my Amazon account. Then I hovered my right palm over the turnstile reader to enter the nation’s most technologically sophisticated grocery store.For the next 30 minutes, I shopped. I picked up a bag of cauliflower florets, grapefruit sparkling water, a carton of strawberries and a package of organic chicken sausages. Cameras and sensors recorded each of my moves, creating a virtual shopping cart for me in real time. Then I simply walked out, no cashier ne …
