Microsoft has announced Microsoft Mesh, a connective fabric for mixed reality collaboration. Microsoft Mesh leverages Azure to allow people in different physical locations using different types of devices to join and collaborate in a shared holographic space. Microsoft Mesh is designed to be device and operating system agnostic. And yes, while AltspaceVR is one of the first applications to support Mesh, there will be more cross-platform Microsoft productivity applications and 3rd party applications soon with Mesh in Preview.
Microsoft is one of the biggest supporters of the OpenXR standard, which means that the company wants to help the industry standardize around a certain level of agreed-upon ways of handling common XR functions and APIs and critical inputs like hand tracking and eye-tracking. Adopting OpenXR as Microsoft has helped solve the XR fragmentation problem and benefit Microsoft’s desire to support as many XR devices simultaneously.