Here are new features available in client:
Support for VR:
VR - Attempting to draw VR UI oustide of VR mode
VR: Splash screen left
VR::CameraMode
VRScene::Render
VRUI::Render
VR_DecreaseIPD
VR_IncreaseIPD
VR_ResetIPD
VR_ScaleIPD
VR_SetCameraMode
VR_SetIPD
VR_SetPlayerHeight
VR_SetPlayerScale
VR_SetTranslateRate
VR_SetUIXScale
VR_SetUIYScale
VR_ToggleCameraMode
VR_ToggleCursor
VR_ToggleRenderMode
VR_ToggleStereo
VR_ZeroTracker
Clan support:
ClanAcceptOfferEvent@RLink
ClanChangeRankEvent@RLink
ClanCreateEvent@RLink
ClanDeclineOfferEvent@RLink
ClanDisbandEvent@RLink
ClanDisbandReceivedEvent@RLink
ClanFindEvent@RLink
ClanKickMemberEvent@RLink
ClanLeaveEvent@RLink
ClanMemberUpdateReceivedEvent@RLink
ClanOfferMembershipEvent@RLink
ClanOfferMembershipUpdateReceivedEvent@RLink
ClanSendTextEvent@RLink
ClanTextReceivedEvent@RLink
ClanTransferLeadershipEvent@RLink
ClanUpdateEvent@RLink
Significant shader upgrades:
old: Microsoft (R) HLSL Shader Compiler 9.30.9200.16384
new: Microsoft (R) HLSL Shader Compiler 9.30.9200.20789
Quite a bit of shaders split or recompiled
New actions on inventory items:
canMerge
canRepair
canSalvage
canSell
canSplit
canTrade
getItemPrice
getSaleItemTimeRemaining
It is possible that this is as much a bug fix patch as it is a major upgrade to some internal systems, and they are using this as an opportunity to do regression testing.
Edit: There are a lot of other hints leaked through but none look like complete features. No point in listing them as they may be scrapped at any time.