Laptop for me?

I took a test at Macworld today, and it says a portable Mac suits me more. I'd like to have one too, but I'm definitely not buying one now, because I (or my dad, rather) have no money, my Mac mini is still new, and the Intel Macs are coming next year. But when I really ask myself what reasons do I have to buy a labtop, I can't suggest one.
The test asked me if the working environment I have now is comfortable, I said no. I guess it's the main reason I was recommended a laptop. Because there's not a big difference between the points of desktop and laptop (6 to 8). Other reasons include I don't use much external devices. But the biggest reason people use a laptop, to use it when travelling, doesn't work for me. I don't need to work outdoors. Maybe things will be diffferent years later when I get into a university. But now I don't need it. I think it's too early to think about that. The laptop might not stand so many years.
Really, I promised myself that I will have an iBook years later (or a PowerBook, now I think it's more attractive). But it's more practical to think about it a few years later, because things will be different when there are Intel Macs. The problem is I can't stop thinking about it. I think about it every time I run across the 'Books. It's unstoppable.