Another week, another gloomy assessment of the PC market. Gartner on Monday released new research showing that “worldwide PC shipments totaled 90.3 million units in the fourth quarter of 2012, a 4.9 percent decline from the fourth quarter of 2011.” The reason that PC sales have fallen, says Gartner, is that consumers are using tablets as their primary content consumption devices and are only using PCs for productivity. In other words, consumers feel much less impetus to replace their PCs if they have tablets they can use for basic functions such as reading the news and watching videos. “We increasingly suspect that most individuals will shift consumption activity to a personal tablet, and perform creative and administrative tasks on a