i Got the Power

We now know that Phil Schiller will do the Stev... ehhh Keynote and introduce the iMac G5 to the world, the biggest news being that we know that from Apple itself. Another big news is that in the first time in history since Apple introduced the iXXX machines to the world, one of them will be more powerful than a PowerXXX. Until now, Apple always made sure that the PowerXXX serie was clocked a notch higher than the highest iXXX machine.
The first side effect is that potential PowerBook buyers might want to wait for a G5 update of the Powerbook. Apple probably knows this as much as we do, should we expect a real blast of a surprise during the Apple Expo keynote ?