2.5 years old Dell, P4 2.2 ghz desktop with Radeon 9600XT, Edit, renders videos, plays games, even Doom3 and HL 2.
iBook 14 inch, G4 1.33 ghz, portable, great battery life, relatively fast and snappy compared to a wintel laptop. Photoshop and field work, no prob.
You know, for the PC market, it's starting to get stagnent too, my 2.4 ghz P 4 is still alive after almost 3 years. Recently just formated the OS + apps holding HDD and reinstalled Win XP, and it feels fresh, snappy and new again. 3.2 ghz? Hyper threading? 4/8 GB ram? frankly, do you really need that? Hee, Unless you have a 3K HDTV DV cam from sony, and wanna edit in HD, maybe or else, my old Dell with 640 ram handles DVs without a hitch. Maybe takes a couple of minutes more to render? No prob, I can surf Clubsnap on my mac, or just sleep through the render.
Well, installing mac OS ain't that tough too, just pop in the DVD/CD, hold C to boot from disk, and then the rest is more of a waiting game.