I would hope that this might finally convince Khronos of the need for a more drastic re-imagining of OpenGL. Hell, Introduce a new open, low-level, cross-platform 3D API if they have to, but they need away to break away from the legacy and move in a different direction than what they are now. Their latest proposed enhancements gain performance but lock you into certain patterns that you or your program might not favor, and still places a lot of burden on drivers.
Everyone else is ready to move to the automobile, and meanwhile Khronos intends to build a better horse.
Equally interesting is what this might mean for Android -- GLes (or Unity) has been the traditional cross-platform layer between iOS and Android Graphics. Android mostly lacks the high-end mobile gaming market already, but when Metal becomes the API of choice for AAA-style mobile games, and it looks to be a stone's throw from D3D12, it might boil down to iOS and Windows Phone serving up high-end mobile games.