While we know how much revenue the Surface line generates, as Microsoft posts these figures in quarterly earnings reports, the same cannot be said about unit sales. The software giant prefers to keep these numbers under wraps, leaving us in the dark with regards to which one of its Windows-powered tablets is most popular. However, a new report by cross-promotion network AdDuplex shares some light on the matter, giving us a usage share breakdown for the six most popular Surface devices, including the most expensive and controversial of the bunch, the Surface Book. The podium looks quite interesting, with Surface Pro… [Continue Reading]