Linux has found its home in those environments for a variety of purposes. My response regarding desktop Linux is true, however. This guy is a business major. In the past few months quite a few Linux converts have popped up out of the wordwork in increasing numbers. I can't wait to see what the next year will bring.
Nobody ever brings up the modern desktop environments that have cropped up in the past few years.
But Linux isn't going to go away anytime soon. Sure, the hype will fade just as it did for the internet, but that won't stop it. If anything, it will mean the further entrenchment of an excellent operating environment whose time really has come.