My impressions so far:
Pages
- I can't seem to be able to use guides anymore. Which is really stupid, judging how Pages is very oriented to making layouts.
- I really like how the page is centered now, instead of aligned to the left.
Keynote
- Same, canvas is centered. Much nicer.
- I completely dislike the new controls to edit things.
Numbers
- I've never liked it. Still don't. Not only does it lack functions, but the way you can have thousands of "tables" flying around is really frustrating.
In review, it certainly seems like they dumbed down iWork. I think I much prefer iWork 09'.