I stumbled across the reference, in another posting, that the Wayland "migration" is targeting GLFW-based desktop managers.
Anyone have good insights on whether GLFW is intended to offer a mechanism for platform-agnostic multi-casting, or facilitate cross-platform "live-drive" of heterogeneous systems?
I have no projects in mind, just curious about possibilities. 
I have no answer to that but wow, that looks damn promising 
Is GLFW currently part of the UbuntuMATE desktop software infrastructure?
[Edit:]
I just did a search on GitHub for both UbuntuMATE and MATE Desktop, and neither project comes up with references to GLFW!
Not knowing the internals of either, intimately or otherwise, I am not able to judge the quality of that search result.
Is that possible?
GLFW is too low level for that.
It is a set of tools/libraries to create graphical toolkits like the graphical libraries of GTK, Qt, E17, SDL and the like.
Desktop distros would theoretically only use the endproduct of what GLFW could create and only if they have applications in their repository that need it.
However, GLFW is in the standard repository so you can install it and actually start to develop a competitive toolkit. 