The global market for tablet computers went into hibernation in early 2014, ending a long run of sizzling growth, a survey showed Thursday. The IDC report said sales of tablets including newly introduced convertible PCs totaled 50.4 million units in the first quarter of 2014. IDC said that the market is suffering from saturation, and that many people are using large-screen smartphones or phablets instead of tablets. The introduction of new 2-in-1 devices such as the Microsoft surface, which aims to serve as a PC and a tablet, failed to gain traction.