PowerBook G5... a Challenge
MacWorld.co.uk questioned Jon Rubinstein, senior vice president of Hardware Engineering at Apple about a PowerBook G5.
While unable to comment on future products, Rubinstein admits that a G5 PowerBook is "an issue of good, solid engineering".
According to MacWorld.co.uk, Rubinstein remarked that the current G5s are designed for Desktop Machines and that lower-powered versions would be required for PowerBooks. That being said, there were doubts about getting even the G4 into a PowerBook when the G4 was first introduced.