Does unfiltered mean un-ageable?

I’ve had a few of the 2006 Signorello wines this week, and they are showing nicely: plenty of interesting aromas, good body and tannins.  But they are young, the body not yet roundly evolved, the tannins still adolescent.  I’d love to try these in a year.

However, the wines are unfiltered.  Does that mean they aren’t stable enough to hold that long?