By John Chambers, Founder and CEO of JC2 Ventures and former CEO and Chairman of Cisco

Ten years ago, I would have said that voice was an interface of the past. Yet today, the voice revolution is well underway and it’s becoming clear that voice will, in fact, be the next major interface. Just look at the proliferation and capabilities of virtual assistants and voice-activated devices, whether it’s asking Amazon’s Alexa-enabled Echo to turn down the thermostat, having Google Home recite your schedule for the day, or instructing Apple’s Siri to read your emails out loud. While nearly one in five Americans has access to a smart speaker today, Gartner predicts that 75 percent of households in the U.S. will have smart speakers by 2020.