hmm..... they gave kerrigan a new look
she probably look more hawt than she was in SC Broodwar
No more the spider claws but now wings

For comparison of the game looks; I don't really think they have improved the graphic quality although they tweaked most of it to an acceptable level.

For all SC and SC2 Fans; we're not here to look at how impressive the graphic quality SC series but to enjoy the game itself.