Those are the two interesting links that I came across recently. They make the statement (rather convincingly) that the Linux has lost in the Desktop front. I look at it from a different perspective. I would say that Desktop has lost its place as a PC (personal computer).
Today, we can clearly see that Desktops are rapidly getting replaced with smart phones and MIDs. And, what are the two most interesting players in that domain? Though a subject of argument, Android is surely one of the forerunners for the title. Next, look at the cloud computing. Though in RC stage, Google chrome OS has made generated enough buzz among the tech community. I am sure that with the weight of Google behind these two distributions, Linux will stay close to you though the Desktop might not!