It looks as though AltspaceVR will be the next social VR platform available to Oculus Quest users, joining Bigscreen, Dance Central, Rec Room, and VRChat. (You can already install AltspaceVR using SideQuest, but this is the official announcement that the AltspaceVR app will be available via the Oculus Store for the Quest.)
Given that AltspaceVR already runs on a variety of platforms (including an Android mobile app), this news hardly comes as a surprise. AltspaceVR’s cartoony, low-poly avatars in particular make it easy to port the platform to a wide variety of existing hardware, including the Oculus Rift, HTC Vive, Windows Mixed Reality headsets, and cellphone-based VR like the Samsung Gear VR and the Google Daydream. It also runs on the Oculus Go, so running on the Quest should not be a problem.