Re: Great...
"How is this going to kill Microsoft off the gaming market? It might hurt Microsoft's aim of DirectX everywhere, but OpenGL runs on Windows, and so will this."
Because, once devs have a non-proprietary alternative to the monopolistic DX, they'll switch to it for more platforms integration. Then MS, will loose more market share, typically the likes like myself who only still have windows because of gaming.
Those will switch to things like SteamOS.
Then, when another reason for loosing Windows (gaming) is there, the question of having it for classical personnal desktop will arise, and given some severe misaps I've seen amongst all my computer illiterate neighbours (win 8, viruses everywhere, vista insta-killed by a patch, etc ...), this would shift more market share to alternatives. A lot of people have fallen to MS's failures in the last 6 years or so ...