[mdawson]

I can definitely see some truth into what you have posted here, montgomery_burns, although I would be hard pressed to call anyone that is not serious about running the Mac OS and Mac applications a Mac user. Mac users are Mac users because of the experience and that means the combination of the OS X and Apple’s hardware that provides them with a robust operating system that (generally) just works well. Windows users that simply like the aesthetic of the hardware will not care about what they are running; Mac users will run Windows and Windows apps only because they have to.
Personally, I also do not see or want companies or institutions to simply dump Wintel PCs in favor of Macs so much as see multi-platform integration. There are areas where going strictly Mac and taking advantage of the virtualization of other operating systems on the hardware can be the best way to go. The K-12 education market comes to mind as that area should be platform agnostic anyway.
Adopting Mac should be about (computer) biodiversity, not a corporate takeover by Macs. Homogeneous environments are always a bad idea.