I think they will continue updating along UE4 does. Because VR has a bright future and Epic Games has incorporated with Nvidia on VR SLI, they will make UE4 better and better.
I hope they could just skip 4.11 and jump to 4.12 since I have seen some important graphic features achieved in 4.12. It would be for new UE4 features work with newer version gameworks features.
I really can’t wait to see frustum traced shadow and volumetric lighting being integrated into UE4.