I think pc arc is most likely near the end as microsoft not able to produce the next gen OS. As the virus attack and different kind of spyware. Hacker is just pushing PC to the end of life. You can't disagree the fact that we might use MAC for everyone someday. Learning it is just an advantage. Beside most people only use PC for gaming and browsing website. Is so basic that you only need 2 week to catch up all these skill.
Iphone is another next great thing that it will eventually stop people from stealing phone. If you pick up an iphone and you wish to switch it off. The only way is to smash it on the floor. Because the battery is fix and you need a password to activate the keypad. HAHA....
"Here's to the crazy ones. The misfits. The rebels. The troublemakers. The round pegs in the square holes - the ones who see things differently. They're not fond of rules and they have no respect for the status quo. You can praise them, disagree with them, quote them, disbelieve them, glorify them or vilify them. About the only thing that you can't do is ignore them. Because they change things."
-Apple computer AD. 1997