I think buyers are capable of determining whether or not it would benefit them to buy the quad G5 now. Like everyone knows, the next technological release will be faster than the previous but will likely have some issues that almost always accompany new technology. The G5 isn't dead. I bought a 400 MHz G3 iMac DV in 2000 because it was out and it's when I needed it. Yes, the G4 and G5 were right around the corner, but I still ran that iMac for 5 years before replacing it with my iBook G4.
Win A Mac mini and a miniStack
Don't Buy A Quad G5