lol.. a Powerbook? So what if MacOS is UNIX based? So is Linux. You aren't forced to run Windows on an x86 machine buddy
Maybe the system architecture allows it to perform better than an x86 running at a similar processor speed, but paying approximately the same amount for a powerbook 15" as an Alienware, or similar notebook, which could smack the **** out of a G4 seems like a waste of money. Once Apple throws in a 128 MB MR9600 or 9700, then we'll talk.
Although I would love to have their auto-adjust lighted keys. Those rock.