From Walmart looking to be a personal shopping concierge to Amazon expanding its Buy with Prime to more platforms and leveraging tech to help consumers manage their healthcare, the two retail giants faced off this week with news of tech with a personal touch that reaches into many parts of consumers’ daily lives.Walmart and Amazon debuted tech at the Consumer Electronics Show (CES) in Las Vegas this week in a digital one-upmanship. Both companies are leveraging innovative strategies, partnerships and techno ...