The changelog is here, and there's also a summary in text and video form. They might warm their hands by a fire or fall in love. Tied into that are improved behaviours for all NPCs, who will now interact with objects and each other. Build a house and people will eventually move in - a more luxurious house will attract a better class of resident. The most important is a set of systems to allow for the establishment of colonies. It's a stable version, as opposed to the experimental opt-in nightly updates, and adds a host of new features. A huge Starbound update landed last night.
