With Pokemon GO earning up to $10m a day, R&D departments are busy searching for the next phase
While Dorothy, blue-skirted and pigtailed, clutching a wicker basket and a bewildered dog under her arm, surveys the weird flowers and pygmy huts around her, she’s sure of just one thing: she’s not in Kansas any more. L Frank Baum’s character was, it turns out, born slightly too early. In 1901, a year after the publication of The Wonderful Wizard of Oz, Baum wrote The Master Key, a novel credited with the invention of augmented reality via a pair of imagined spectacles that could map information on to whatever or whomever its wearer looked at. Had Dorothy owned a pair, she might have learned that she’d been whisked to Oz, or that her new friend the Tin Man was in need of a heart, even, perhaps, that a wicked witch is burned not by fire, but by water.