Is this [refining] theorycrafting of something we're going to work on someday in the future, or is this stuff that we're actively developing right now?

It's in design. Well, design is done and approved. It's waiting for an actual programmer to finish some of his current work and to jump on this.

So, signed-off, approved design, just waiting for resources to get going.

Pretty much. And it's soon™, but yeah, fairly soon. We're not looking at this in years and years from now. We're waiting for one feature to finish, and then we're going to be looking at it.