1.9 should go live this week. It's currently in beta testing; if you're interested in further details, head along to:
http://steamcommunity.com/app/254200/discussions/0/648814843666457443/
The main highlights of this patch are fightable mobs with loot, a brand-new help system, some absolutely massive performance increases, lifts ('elevators'), and the beginning of the Tier3 machinery.
By far and away the coolest new Survival feature, however, is the HoloBase mode; this mode lets you remotely examine your base and any issues with it's production from literally kilometres away. Check it out!