(I mean this as purely a bit of comic relief. Texas is in dire straits right now, and I wish the people and infrastructure all the best in this time.)
Although the "scoped" chat feature is only an ancillary addition to the larger idea, it is something I've felt is much-needed in the experience of not just Minecraft, but multiplayer games in general. Imagine how much more intense a capture-the-flag style strategy game would be if you could only hear your teammates' voices when your in-game character was within in-game shouting distance. Going further, one could explore the capabilities of surround-sound headsets that could "project" your teammates' voices into your ears from the direction they are standing relative to you in-game.
We are all so excited about the recent progress in visual virtual reality, but the untapped potential in our auditory VR experience (especially in a social sense) is worth reckoning.
But I remember the early days of MySpace and Facebook with a certain nostalgia, and I'm pained to see the current state of all these tools. Such a thorough report as this gives me a little hope that perhaps an acceptable middle ground can be found for Internet communities at large scales.
I don't think I'll be hopping back in any time soon, but perhaps the research and positive advancements in social media aren't over yet.