I think they had to use G5s, because they needed a powerful PPC system as the 360 is based on PPCs......

I think it is very interesting to see those pics...I mean we "know" the demos showed a third of the 360s power and those demos were run by TWO (!) G5s (I mean, those systems are not really that weak).

That'd mean the 360 has the power of 6 G5s (ok ok, I am not really sure if you could estimate the power like that but it's fun anyway

).

But I like the idea that the power of those two big boxes is just a third of the power that this small white box in the front will have one day....

Actually we now know that neither Big N nor Sony nor MS showed "real" consoles.......