We still have a couple of issue to resolve but soon - most likely next week unless there is a hitch.
The most likely setup will be two (4kx4k) worlds, then two per ‘region’ (EU/US/etc). These are separate from the old universe and you wont be able to swap in game, only by switching branch in Steam.
I know its taken a while but it will be worth it for the longer run. Its running well on the PlayStation 4 with the work that has been done and that is big a win for all as it open up the game to more people. The servers get big win too so we can support more people on each world.