Apple Computer, Inc. is no longer. The company changed its name to Apple, Inc. This is fitting for a company as detail-oriented as Apple. They realized that computers were no longer their main focus.
Windows PCs have always outsold Macintoshes. But the rate at which PCs outsell Macs is constantly changing. Since 2004, that change has been momentous.
And if you think line drops sharply, consider the reason Apple changed its name: iDevices. Check out the other graphs at Asymco – the line gets steeper.