IDC has finally published its Q1 2013 report of the tablet market, and it isn't good for Microsoft. Between January and March 2013, Microsoft sold just 900,000 of its Surface tablets, essentially showing no growth from Q4 2012 -- and more importantly, despite the January release of the Surface Pro. These figures are even worse when you zoom out: In Q1 2013, 49.2 million tablets were sold worldwide -- a year-over-year increase of 142%, with Samsung and Asus showing YOY growth of 282% and 350% respectively.