Currently most Evernote users interact with it primarily on their mobile phones. But when Libin looks to the future of computing, he's extremely bullish on wearables. He said Thursday at the exclusive f.ounders conference in New York City that while productivity on desktop computers flows in cycles of two-to-three hours, productivity on a cell phone screen is achieved in much smaller chunks of time. "It's not just that the screens got smaller, but on phones, you have to solve the problem of 'how do you make someone productive for two-to-three minutes,'" Libin said. And apps are ideal for short, minutes-long interactions. Libin is a big believer that within a couple of years, smartwatches and eyeglasses will be mainstream. In other words, computers will be worn rather than held in a palm. And that will inherently change how individuals interact with the programs or systems the computers run--including Evernote. Get the full story at Inc.com