DisplaySearch, a market research firm focuses on the display supply and solar cell industries, predicts a near doubling of the tablet market in 2011, to 55.7 million units. The company forecasts that the arrival later this year of the first wave of serious contenders to the iPad -- as well as the expected second-generation iPad itself -- will build on the market momentum created by Apple and Google and the strong trend towards mobile devices of all kinds. DisplaySearch expects that by 2014, mobile computing devices (notebooks, netbooks, tablets) will ship over 500 mil