An airline sends a regular customer an e-mail about a special promotion on flights from New York City to exotic Caribbean destinations. The company had noticed she’d recently browsed vacation sites. The interested shopper eagerly clicks, landing on a page that shows all the airline’s flights from all the cities it serves to all its destinations. By the time our erstwhile traveler has waded through this screen to find flights from John F. Kennedy International Airport and LaGuardia Airport, she’s no longer seeing palm trees in her head—she’s seeing red. This is the fault line of the modern digital-shopping experience, where reality falls far short of the promise of receiving what you want, when you want it. Click here to read the entire story