Unreal Engine 4.25 Preview

Wow this is huge:

Fixed! UE-86191 "Scene Capture Component 2D" Causes Big Performance Dip In VR

Portals and stuff in VR may become much more viable. Is it known exactly how much the performance decreased? I remember, it dropped about 20 FPS for me from 4.16 - 4.21.

Will there be anything with regards to mouse cursor not leaving the screen in a VR environment ?