Is it too late to revive Windows?

Microsoft may be working hard on its next PC operating system, Windows 8, but an investor at the well known private-equity group Elevation Partners believes that the heyday of the Windows OS may be over. The Wall Street Journal reports that the group's Roger McNamee believes that it is "too late to revive Windows". The reason is that he believes the PC market is moving over to the tablet and the smartphone. While he says that Microsoft will still have other successful businesses such as its upcoming acquisition of the Skype Internet phone business, he adds, "We are past the point where Windows can return to its former glory. The market has moved on."