It's an interesting commentary that does bring up a good point. You can break down today's desktop usage into office work, gaming, multimedia, social networking and numerous other facets. The majority of these did not exist when the desktop was spawned, and who knows what new facets will come to light as the desktop continues to evolve with the advent of cloud-based computing and smartphones. If Linux tries to compete with modern-day Windows desktop standards, but does it on a game plan that lasts five years or so, it seems that it would be a losing proposition.
Perhaps the stance of competing with Windows is the wrong one to take. Rather than overcome existing barriers, Linux vendors need to predict what sort of obstacles the desktop will face in five or ten years. It seems Red Hat may be on to that notion, and could offer something completely different in the future.