Shipments of non-Apple tablets should rise 134 percent in 2012, even as the iPad grows only 55 percent, according to market estimates quoted by Digitimes. While the iPad is still forecast to hold a commanding lead, with 54 to 55 million units, shipments of Android-based tablets are expected to grow to between 44 and 45 million. Only 19 to 20 million Android tablets are predicted for the whole of 2011.