I believe this is the first time Apple has removed the year from the brand, which is rather smart of them. I've had trouble selling off my copies of Office '07 because people just look at the year and scoff, as if it's broken because it's a few years old.
There are too many teams at Apple to be "diverted." If they want an iWork in 2010, they'll have one. However, iWork '09 seems to be a hot seller and offers everything we could want for now. Until the next big innovations and feature list, I'm VERY happy with '09.