I was reading an interesting article in a trade mag the other day that stated 'for the average user' which by the way is around 73% apparently, that a Mac or higher end PC is still more than good enough spec wise for 5 years or more.
It does make me wonder then when I read these forums why so many users upgrade so often - what is the point other than bragging rights?
My iMac is 3 years old and I have just extended the warranty for a further 12 months.
As and aside Apple have recently released a MBA with a 21.5" screen which they are calling an iMac!!!!!