The world’s going mobile and the PC just can’t keep up. Recent reports indicate that last quarter, the number of tablets shipped was more than half the number of PCs, compared to the 3rd quarter numbers from November, which showed almost 1 in 4 computers sold were tablets. The trend does not show any sign of slowing down, and suggests more than a shift in computing hardware sales. Windows may now be losing its long-lived market dominance. Of all PCs and Tablets shipped in the 4th quarter, a third of them run OSX, iOS, or Android. The definition of “personal computing” is certainly changing. Will Microsoft be able to adapt in time?