I keep reminding myself that iPads are only a year old. The apps written for them are new, and no one, not even Apple, really knew just what was going to be be important to most users. When the iWorks apps were added I doubt they considered them anything but a make shift tool for the few people that would want to do some "basic" document creation.
A year later it is becoming obvious that more than a few people want a real desktop replacement option, at least for light professional work.
I expect Apple to start adding new features to the iWork apps, but it won't be quick and it may not be what you would expect. Useful as iWorks is it was never intended to be competition for high end applications. It is geared to be an all arround personal suite that can be stretched to do some busines stuff. The only reason it find itself being used this way is because no one else has stepped forward and provided a solid business solution.
The MS comptible apps are ports of older stuff meant for PDAs and phones. When someone gets seriouse and realises what a huge oppotunity a bottom up designed for tablets centric cloud based office suite could be, we'll start seeing some real business class tools.
Not that I care, beyond a desire to see progress. Pages does what little I need.