I find it fascinating that we keep trying to build things that already exist, but on top of another app (web browser). I mean, it's cool to see, and it will have its use-cases, but I wonder where we'd be if we didn't have to do this.
My personal pain point. I teach entertainment engineering at univ. We need this. All the time. Getting IT to install this in a classroom is a pain. It has already reduced my pain regarding this (anecdotal, yes. But I see the results and am planning to do a usability study). Thought it might be useful to someone else.