I'm not so sure it spells doom for EU fans. Why couldn't you enjoy 3 more Star Wars movies if they're made and NOT continue to enjoy the Zahn books?
Not meaning that the EU fans will not enjoy the new movies. Just saying that there are very loyal EU fans out there that (believe it or not) prefer the EU stories to the prequal trilogy and the CW TV show.
Alot of peoples first exposure to Star Wars WAS the EU.
The EU following is a growing entity that continues to dominate the SW Universe. Think about it. We've only had 6 movies and 5 seasons of the CW. Compared to numerous novels, comics, video games, etc.
The EU is what brought Star Wars back from the dead with the Thrawn Trilogy and the DH comic series "Dark Empire"
The EU market even dominates the toy line with it's EU figures. Everybody wants the EU figures but not the regular figures.
The EU fans may feel negleted when the new movies come out. They already get upset when the CW over-writes the EU.