Indeed, I'm well aware of glTF, and it's a cool initiative. Just didn't want to overwhelm readers with new stuff.
Also, even though it doesn't have the same backing yet, I'm more optimistic about OpenGEX as an exchange format because it's not such a big ask. It serves the same purpose as FBX, but is completely open source. glTF on the other hand - and please enlighten me if I got this all wrong - is asking engines that already have their own tailor-made runtime format to support this one as well (or even instead). That's asking a lot.
I guess if glTF could convert FBX files as well as it converts COLLADA, it'd quickly become a lot more attractive. Maybe support glTF output in fbx-conv?