Keeping track of your emails and staying on top of your calendar might be hard enough, but for American software developer Chris Dancy, life doesn’t feel complete without several hundred data sets about his life being fed to him simultaneously at all times. “I’ve been called the most connected human on earth,” he says, when we meet at London’s Wearable Technology Show in Olympia, an event that feels like a cyborg convention, where mostly middle-aged men wander a room sporting strap-on cameras and glowing wristbands.