He's saying there are more games on Windows than on the platforms that use OpenGL. I don't know if that's true or not, but it's a reasonable argument. It doesn't really matter how many platforms implement OpenGL if nobody uses it.
> It doesn't really matter how many platforms implement OpenGL if nobody uses it.
Except that it is used, extensively; it's just not used much on Windows. Therefore, looking at Windows games and proclaiming that OpenGL is dying/dead is a really silly thing to do -- OpenGL ES knowledge is an extremely hot commodity among iOS and Android devs, etc.
