The latest Gartner numbers on PC sales released Thursday were truly atrocious as they showed that overall PC sales declined by just under 7% year-over-year, which Gartner says is “the worst decline in PC market history.” Gartner says this decline could be particularly acute in emerging markets where tablets and smartphones present much cheaper alternatives to full-blown personal computers. The Washington Post’s Timothy Lee takes a look at some of the devices on display at CES this week and finds that traditional PC OEMs are already preparing for a world where full PCs are relegated to niche products that are used in offices but not much anywhere else. “Conventional PCs face a growing army of cheap, special-purpose rivals,” he says. “No