So let's see, so far this update will give us:
Moving entities, including armies making camps while wandering the map and bandits you can track and mercilessly slaughter, the survivors tracking YOU down and seeking vengeance, proper tracking (of course), proper sneaking with multiple speed settings, non-lethal combat, towns showing signs of being pillaged like skewered bodies, proper and unique sites for all the races, customized opening messages instead of the generic block of text at the start of adventure mode, some creatures are able to sense blood or creature classes, a combat/movement split, and better reaction moves (catching an incoming fist and turning it into a wrist lock). This'll be fun.
