Why has Imac and macbook and Ipod and Iphone moved from 5 percent of the market a few years ago to about 25% in the U.S.? The main reason is that people are just completely fed up with adware and viruses ruining all their work. And the fact that once one learns to use a Mac it is just much simpler to use. And if you want to do music or art or movies then the best choice is Mac. If you want to do gaming the best choice is a custom built PC still. But even that is starting to change.
So, people are willing to pay a little more not to get hassled by viruses and adware almost not at all. This is basically what is happening in the U.S.
If you deal with PC's you have to expect crashes, viruses and adware problems. If you have a Mac you will not experience this about 90% of the time. However, the real problem is that if enough people go Mac then hackers will likely start attacking Macs too. However, now is the time to own a Mac. At least for now.