Mobile devices such as smartphones and tablets have long been considered the future of computing and a new projection from market research firm Gartner shows just how important the mobile market has become. According to the firm’s estimates for 2013, Apple (AAPL) devices will outsell Windows devices for the first time this year. The estimate takes into account sales of Apple’s iPhones, iPads and Mac computers as well as desktops, laptops, tablets and smartphones powered by Microsoft’s (MSFT) various Windows operating systems. In 2012, Windows device sales totalled 175 million units while combined sales of iOS devices and Mac PCs reached 159 million. As The Financial Times noted, Gartner also projected that tablet sales will overtake traditional PC sales by 2015.