It's a blast to play and for some reason it looks worse in the direct-grab screenshots that have been released lately than it did at E3. I didn't hear anyone bemoan the graphics at the show. Sure they're not this generation's best, but they're not the eyesore they're being made out to be here either.
Check out some of the video clips in
this StarCraft: Ghost preview to get an idea of what the game looks like in a normal play environment.