In 2013, Apple’s chief executive, Tim Cook, said that gadgets we wear on our wrists “could be a profound area of technology.”
It wasn’t. Maybe you own a Fitbit or an Apple Watch, but that category of digital devices hasn’t been as momentous as Cook and many other tech optimists hoped.
A half-decade ago, Pokémon Go persuaded people to roam their neighborhoods to chase animated characters that they could see by pointing a smartphone camera at their surroundings. Cook was among the corporate executives who said that the game might be the beginning of a transformative melding of digital and