This just got out and we found out about it in streamlabs blog. They have been working in a gamer overlay to help single monitor streamers to see chat and events.
You can read all about it this link : https://blog.streamlabs.com/game-overlay-7bc980cac520
Introducing the Streamlabs OBS Game Overlay, an innovation in the way live streamers with a single monitor engage with their community. Game Overlay is a cutting edge new feature that gives streamers the ability to view chat and events overlayed on top of the screen. It is an exceptionally convenient and critical feature for live streamers with a single monitor.