Sounds like what I am seeing in my personal life... 6 years ago I didn't know anyone with a Mac... Now I can think of 14 people off the top of my head who all own a Mac (who didn't before)... And all but 3 of them bought MacBooks... The other 3 bought iMacs... The shift to internet based applications has made the OS less important, and people want a hardware/software combo that just works.
I'm not including all the people I know who have iPhones an or iPads and a PC... @karlos give Objective-C a chance... If this trend continues it will likely be one of the dominant programming languages of the future
