I disagree.
Keynote is Pro quality.
Yes, Pages is iWork quality, but frankly, Pages is a train wreck of a v1. If Apple put into Pages about 10-20 core features and got the bugs out, people would dump Word like there is no tomorrow.
The fact of the matter is this: people use about 5% of Office's power. And the only reason people flock to it is due to the file formats and compatibility with others.
Get iWork to have true, 100% Office file compatibility and beef up Pages and add a solid spreadsheet, and iWork will take off in a big way. No point spending that much on Office when you can get something better for a fraction of the price.
Apple is going to move slowly here. Not scare MS with a one-time major release. But iWork will be pro. Just give it time.