More important: consumerism may become a serious disease. The question "do I need this?" is the most hard to make sometimes.
Couldn't agree more. I too used to "collect" Macs, mostly stuff I got free. Then I started to realize I didn't really need most of the stuff I had acquired, so I started selling off what I didn't need. I decided I'd rather have more space (and more money!) than more stuff, and I still believe that was the right decision.
That being said, I will be getting a 17" Ivy Bridge MBP when they come out-- but it'll replace my old 2006 15" MBP, not supplement it.