Open-source Mesa developers actively participated in this discussion along with NVIDIA's Andy Ritger who was in attendance at the X.Org Developers' Conference.
For the background information to this discussion, see A New Linux OpenGL ABI Is Being Proposed.
During the presentation, Ian Romaick confessed "I want to see GLX be deprecated." Ian is pushing for EGL to be used instead of GLX. "Supporting new GLX extensions is a hassle, indirect rendering should die."
Romanick additionally wants to "convince all distributions to ship EGL by default and convince distributions to use EGL internally."
Andy Ritger then said that while the NVIDIA Tegra driver supports EGL, the NVIDIA GeForce Linux graphics driver will be working on proper EGL support for the near future.