The same goes for computers, people have to change to ensure their survival. Live or die, you decide. 
I have decided. Open source or nothing.
And on one hand I doubt that the average luser will follow suit, which means Linux and open source remain marginal. On the other hand, I'm betting MicroShaft and it's corporate software buddies will start playing hardball (i.e. getting open source outlawed, or void the GPL) when they start seriously loosing marketshare; so I'm doubting that I'll be left with much choice in the long run...
-RAnthony
Micro$oft is already claiming that Linux uses some of their IP. They wont say which IP(s) exactly, but that is part of what their deal wit Novell was all about.
http://www.computerworld.com.au/index.php/id;839593139;fp;16;fpid;1I think that its possible that the average user may follow suit. Ubuntu is pretty n00b friendly. You could probably never touch the command line if you didn't want to. And it looks pretty good.
I am sure that people 'switching' from Apple or M$ would have a few growing pains, but nothing really radical.
If you were just learning how to use computers, then it would be no different than learning Windoze or OSX.
I think that the 'average user' is simply unaware that there is a free alternative. We need to get the word out to people.