Notification to Xbox One activity feed when you start your Stream (PC too)
Twitch adds notification on Xbox One side on its activity feed when you are going to start your broadcast and also it adds notification when you have finished like "*** has broadcasted got 1 hours 44 minutes".
I believe that Beam will work similar way when it comes to Xbox One, but here is the challenge and what doesn't work with Twitch well or anymore at all:
When you are streaming your Xbox One game with Elgato and with PC it should also made that same notification on Activity feed at least for Xbox games like you would do it on console side.
Why PC for streaming and not from console? Because a lot of better picture quality and 60FPS.