It’s a snowy Saturday in Chicago, but Amy, age 28, needs resort wear for a Caribbean vacation. Five years ago, in 2011, she would have headed straight for the mall. Today she starts shopping from her couch by launching a videoconference with her personal concierge at Danella, the retailer where she bought two outfits the previous month. The concierge recommends several items, superimposing photos of them onto Amy’s avatar. Amy rejects a couple of items immediately, toggles to another browser tab to research customer reviews and prices, finds better deals on several items at another retailer, and orders them. She buys one item from Danella online and then drives to the Danella store near her for the in-stock items she wants to try on.