The team behind Siri have a new idea: a voice-controlled personal assistant – linked to all your devices – that will take care of your every needSo I’ve arrived late at the office of Viv, an artificial intelligence company based in San Jose, California. I missed my train from San Francisco after dawdling leaving my apartment and then finding the taxi service app on my phone wouldn’t work. Dag Kittlaus, who I’ve kept waiting, looks on the bright side. “Your trials of getting here are a perfect illustration of how Viv will be helpful,” he says