We've almost crossed the 'novelty' threshold - after January 26 (i.e. in 2 days) the resolution of Dawn's images will exceed the best that Hubble can offer for Ceres. And then it just gets better and better!
http://en.wikipedia.org/wiki/Dawn_(s...Ceres_approach
(That resolution threshold for New Horizons / Pluto will occur on May 5)