Announcing OpenXR: The Khronos Virtual Reality Initiative announced in December is making rapid progress in designing an open standard for portable Virtual Reality and Augmented Reality apps and devices. Today, Khronos releases the official name of the standard: OpenXR. The group is made up of a whos-who of VR industry leaders working together to combat industry fragmentation in these markets. Any interested companies are invited to join Khronos to get involved and help steer the VR industry.
https://www.khronos.org/blog/the-openxr-working-group-is-here
An important thing to notice is that all current VR competitors are on board.