The Misconception: You prefer the things you own over the things you dont because you made rational choices when we bought them.
The Truth: You prefer the things you own because you rationalize your past choices to protect your sense of self.
The Internet changed the way people argue.
Check any comment system, forum or message board and you will find fanboys going at it, debating why their chosen product is better than the other guys.
In modern consumer cultures like America, people compete for status through comparing their taste in products. (You can read more on how that works here: Selling Out).
Mac vs. PC, PS3 vs. XBox 360, iPhone vs. Android it goes on and on.
Usually, these arguments are between men, because men will defend their ego no matter how slight the insult. These are also usually about geeky things that cost lots of money, because these battles take place on the Internet where tech-savvy people get rowdy, and the more expensive a purchase, the greater the loyalty to it.
Read More of the above: You Are Not So Smart
This is a great insight into our world and perhaps, the "higher cost" of Apple products is what created Apple Fanboys, and why you rarely see a Dell Fanboy.
You do see Microsoft Fanboys, but when you think about the high cost of Exchange Servers, Microsoft Server OS, and the cost and time involved in using any operating system (Mac or Windows or other), time and money is invested into it, even if that OS didn't cost a lot or anything itself.