VR-OS - A new operating system beyond the limits of your monitor
Watch2Gether - Watch2Gether is an app that allows multiple people to watch the same content simultaneously and interact with each other while watching.
YouTube VR - Watch YouTube cat videos (and more) in VR with Daydream
Metastream - Watch streaming media with friends
Google Earth VR - Walk the earth in VR
StreamParty - StreamParty is a watch communiry, that allows you to watch video streams in sync with the people you care about, on multiple services.