This has been done thousand of time, some of my friend even stick to Mac OS on their PC. No more waiting to save money until acne coming out just for an Apple product. Now, it comes to me about the Mac and PC machine, when I say machine, it’s about machine. Of course it’s more or less about the operating system as well.
1, Mac and PC, now it’s only about the machine. Nothing big about the machine anymore. Ever since Mac OSX can be installed in a PC, everyone tend to buy a PC or some PC clone came to the market.
2, It’s about design now. Though some (If not most) people still using PC. It depend though, some people buy a Mac machine because it is the Mac design, people will know he/she is using a Mac. Ok, it’s the ego 
Or sometimes, it’s about ethic.
3, Software. There’re actually 3 type of operating systems in the market. The revolution of using Intel on a Mac makes the possible of all operating systems to be install in all kind of computer. We’re all living in a great world isn’t it 
Last thing I know, Apple better legalize and sell Mac OSX operating system only.