More people are becoming more advanced users. I like to think of it in terms of a math equation. User + Purpose = OS. For example:
Noob, just point and click + Web and email = Windows
Noob, just point and click + Web and email at work = Windows (Pro)
Power user, still mostly point and click + Web and email = Ubuntu
Power user, command line literate + Web and email = Fedora
Sysadmin + basic nonessential services = ANYTHING, doesn't matter.
Sysadmin + essential services = RHEL, CentOS, BSD
Satellite systems engineer + Mission critical ground console = HPUX
Or something along those lines.
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