I agree that pushing for OpenGL ES would probably be best, but that also means waiting 4 or more years before OpenGL ES 4.0 is probably going to be available, if the transition from 2.0 to 3.0 is any guide.
Plus, at least from Nvidia's point of view, which already had support for OpenGL 4.3 in Kepler from the desktop space, so they didn't have to do a lot of work to get it in mobile, this is a no-brainer, as it gives them some competitive advantage that probably won't be replicated very soon. I figure even if Imagination wanted to do it, it might take them another 2-3 years before they have it.
Plus, at least from Nvidia's point of view, which already had support for OpenGL 4.3 in Kepler from the desktop space, so they didn't have to do a lot of work to get it in mobile, this is a no-brainer, as it gives them some competitive advantage that probably won't be replicated very soon. I figure even if Imagination wanted to do it, it might take them another 2-3 years before they have it.