We’ve been talking up the replacement of desktops (and then laptops) by mobile wireless devices for a long time. Here’s more proof that the future is as foretold: Lenovo ascended to the top tier of technology companies two years ago, surpassing Hewlett-Packard to become the world’s largest maker of personal computers. But with the PC market in steady decline, Lenovo had already been making drastic moves to ensure its future viability. “We’re already seeing the demise of the PC market,” said Shahid Khan, a managing partner at the Meridian Advisory Group. “This is foresight on their part.