Windows 8 Hurting PC Sales?

(4/10/2013) This news sounds insane, but it is real. "Global shipments of PCs fell 14 percent in the first three months this year, IDC said. That's the sharpest plunge since the firm started tracking the industry in 1994." When I worked as a reporter covering PC industry (when PC industry was booming in late 90's), a new Windows OS was always anticipated and viewed as a demand driver for all PC related companies.

How does it turn upside down this time? Is PC now too powerful and complicated that low usage users just turn to tablet? Or maybe some heavy users switch to Mac (Apple's Mac don't have such a serious problem at all) and say good buy forever to Microsoft? I guess so.