User specific stream overlay.
Beam really has some cool interactive features so far. I was curious if there was a way to add a layer over the actual stream player (would need to also work full screen) that would allow the channel to display information that is user specific. Lets say the user does something like !coins in the chat and instead of replying in the channel or through whisper, you could have it pop up on stream for only them to see.
I am not sure exactly how this would work because the broadcaster would need to be able to create/edit the content of the player overlay and communicate with it directly. If it could work through, the ability for streamers to really turn their stream into a personal experience with the viewers would go over well.