While I feel that the PC still has important advantages, functional and otherwise, over the competition, the gap is closing. And maybe its time to think about some PC key differentiators, and how they might be eliminated by Apple, Google, or others.
I've written about these issues a lot over the past year or so because the competitive landscape is changing so quickly. As Microsoft pushes forward with key platform differentiators, its competitors have responded in kind by eliminating or at least softening Microsoft's advantages. And Microsoft is losing this fight.