The 1.3 update has been in the works for 15 months, and is bringing numerous gameplay and UI changes. There's a full changelog for those of you who are interested in the specifics.
RimWorld is currently on sale, so now is the perfect time to get into the game ahead of its imminent update. A recent post on the game's Steam community page claims the update will be coming 'in about 2 weeks', and will bring a host of quality of life improvements to the simulation game. Sci-fi space colony game RimWorld will be getting a free 1.3 update and a new Ideology expansion.