It's an interesting read in deed. Although most of the things he says are based on speculation. One thing's for sure, the PPC 970 or any variant thereof will never make it into a PB. So if we'll ever see a PB G5 or not depends on Apple's branding. IBM might develop a chip suitable for a notebook which is more or less different from the 970. Apple might or might not call it a G5. As for the "Cell" chip. Although I didn't read the complete article, it sounds promising. So let's hope Apple gets this right.