Walmart CEO John Furner is turning the retailer’s 5,200 U.S. stores into an unstoppable AI engine

As he belts the last note of his pop hit “Mystical Magical,” Benson Boone, in a white muscle tee and skintight jeans, backflips off his piano—and 10,000 people inside the Bud Walton Arena in Fayetteville, Arkansas, erupt into raucous applause. And he’s just the warm-up act. Boone is followed by Shaboozey, who sends the audience line dancing in the aisles, then Pink, who blasts through her hits. But the morning’s biggest rock-star reception is reserved for a clean-cut guy in a gray suit jacket...