PC vs. Mac: It's not zero sum

You're a Mac. And you're a PC. You're both. Welcome to the reality that isn't what the zero summers---folks that think you need to be all Mac or all PC---portray.

According to research firm NPD Group, 12 percent of computer owning households own a Mac, up from 9 percent a year ago. However, the U.S. is all about mixed hardware environments. Of the 12 percent of households that own a Mac, 85 percent of them also own a Windows PC.

In fact, 66 percent of Apple households own three or more computers. In Windows households, only 29 percent own three or more PCs.

The big takeaway: Apple households are affluent. They own more of everything---iPods, cameras, TVs and GPS devices.