With the games I'm playing at the moment, Legend of Grimrock and Toy Soldiers, I really couldn't see a point in chaning from a E8400 @ 4Ghz and a GTX 460. It does everything that I need and does it well.
skyrim ran with no issues.
I will be looking forward to the new Civ V expansion but even that should run fine.
I sort of played with the idea of change when the IB platform was released but I know that the Haswell ones should be out in less than a year, but maybe I'll skip that as well. It is pretty hard looking to change from my system as it simply works and never BSOD's etc.
I have just bought myself a new compact camera for around £290 and I would prefer to spend my money on stuff like that then what would seem to be a pointless "upgrade".
In a way it is a good thing, for me, as it does mean that I can buy other things much worthy of my spending money than just the almost annual "upgrades" which would be felt necessary to play the latest title that often would not be completed.