Some people just can't understand that most of the users don't need half what MS Office has to offer and iWork for example is very nice little office suite I use almost everyday. Pages, Numbers are more than enough for me and as you said Keynote rapes PowerPoint almost in every aspect.
If that's the case then that's a real shame as PowerPoint is heavily used especially in financial institutions and with the current Apple model the chances of iWork seeing the light of day in a corporate world is dim.