Not exactly a huge surprise here, but a new study out from NPD DisplaySearch today has confirmed that the trend towards larger screens in continuing at a steady pace in all but a few key areas. The big exception is "mobile PCs," which NPD defines as laptops and tablets for its purposes. That area dropped from a 13.6-inch average in 2010 to 12.1-inch in 2012 (with an ever so slight increase to 12.2-inches projected for 2013), a drop that represents a ten percent decrease overall and is largely attributed to the growth of tablets . All other areas have seen small to significant growth in recent years, with LC