Originally posted by serpicolugnut
The only problem with Apple releasing the 970 at WWDC is this: To fully utilize all that a 64-bit CPU (which the 970 is) has to offer, the OS and the applications have to be tweaked. So, although Apple could release a Power Mac with the IBM 970 in it at any time they see fit, until Panther comes out (Sept. is the best estimate I've seen so far), and the developers tweak their apps to take advantage of it, any speed gains will be negligible.
The problem is a 1.4ghz IBM 970 running 10.2 and the current crop of apps isn't going to be any faster than a 1.4ghz G4 running the same OS and apps. In fact, it might even be slightly slower because without software specifically tuned for it, the 970 has to process 32-bit info in a psuedo emulated state, sort of like how the first_PPC machines ran 68K code.
So, a Power Mac with the 970, although it could hit the market in June at WWDC, wouldn't really be ready until Panther ships, since it will need the new OS to fully take advantage of it's speed.
My guess: you'll probably see an announcement of the machines at WWDC, with a launch shortly thereafter, but with the initial bunch running 10.2, with a free upgrade coupon to 10.3 when it ships in August/Sept/Oct.