Anton's question
Why would someone want an iBook when we could get the powerbook instead?  That was Anton's question.  The answer:
people like myself - I am a high school chemistry teacher who would like a portable computer.  now, it would be really cheap to get a PC, but I'd prefer an Apple (plus the whole school is on apple).  Can I afford a $2500 G4 Powerbook?  No way!  
Therefore, there are people like myself who would LOVE to have th powerbook, but simply cannot afford it.  Does that answer your question?