I do not believe it will hit G4, and I do believe the 12 " might die if the previous rumors of low production is true. If the cost of 12 " is higher than the 14", it would be difiicult to make an intelligent price plan without taking a hit on the 12". Knowing Apple: I don´t think so
On the other side, its interesting to see that the eMac has G4 and that Xserve now is running G4. Apple should be able to get a very nice price on their volumes now. Beside eMac is a educational maschine and the iBook has been targeted against that marked in several speeches from Steve.
I do believe we will see G5 in the powermacs to hit MWNY. Several rumors points in that direction and the decission to put G4 in imacs and the low upgrade of the powermacs earlier this year really nails it. (the current G4 can be delivered in 1.6 Ghz with 2.0 later this year. But the G5 starts at 800-1200Mhz but the 1200 mhz bangs the intel p4 2.0 in spec2000!. And this is just the beginning!)
The chip is supposed to have been in production closed to 4 months now with no new rumors in delay, whitch tells us that yeilds should start to improve.
The big problem with G5, which explains why we would not see it in Xserve and laptops in some times, is it need for power and thus the heating problem. This ting will need a _good_ fan.
I think the most problematic part of G5 is the new chipset; there is a new memory access and some other features that need a lot of work, but even if they cant be delivered on MWNY ; I will bet a good solid dollar that it will be presented.
iBook G4 ? best bet; August 02 or if there is now way to bump the tiBook : MWSF 2003
Powerbook G5? Only God knows.