cobalt VS VK-GL-CTS

That's nothing but a wrapper for https://YouTube.com/tv. The source code is available at https://github.com/youtube/cobalt

Minecraft Java edition uses the OpenGL graphics engine, which was created by the Khronos Group. Vulkan was also created by them.

In the C++ standard, there is nothing. But if you are searching for something that can qualify as a standard, try the Khronos Group libs, here: https://www.khronos.org/

The caretaker of the SYCL spec is Khronos a non-profit standards body that is home to several projects focused on graphics, machine learning, parallel computing, VR and visual computing. You will note that all these pieces work together to build frameworks. Some of the more visible ones that you might be familiar with are openGL and Vulkan.

Why does the Khronos group have so many standards? Do they really need all this?

It's more than that, it's the official conformance tests:

https://github.com/KhronosGroup/VK-GL-CTS/blob/main/external...

https://www.khronos.org/ is the open standards body in charge of OpenGL and Vulkan. They’re pretty far from being a big commercial product maker ;)

The Haptics Industry Forum (HIF) and The Khronos® Group have entered into a cooperative liaison agreement to foster synergy between the two organizations to encourage the integration of advanced haptics functionality into the Khronos OpenXR™ open standard for portable augmented and virtual reality, to enable broad availability of haptics in the metaverse and beyond. This agreement enables HIF and Khronos to collaborate with a shared goal to enable broad, cross-platform access to next-generation haptic feedback in XR applications, enabling rich multisensory experiences to reach beyond 3D visuals for the eyes and spatial audio for the ears – and include expressive haptics for touch.

The true metaverse concept (not rebranded private apps like roblox, vrchat, second life, decentraland or horizons) will be based on an open set of standards, which are still in development.