A Microsoft OS still runs on over 90% of the desktop market.
OpenGL seems like a no-brainer for future survival as MSFT platform dominance exhibits entropy.
The PS3 used a proprietary API based on OpenGL 1.0.
http://www.eurogamer.net/articles/digitalfoundry-how-the-cre...
On traditional PCs and Macs, Microsoft
still owns an overwhelming market share,
with 91.8 percent of all traffic coming
from Windows-based machines. Among non-
Microsoft operating systems, both OS X
and Linux have stalled since October
2011, hovering around 6.9 percent and
1.2 percent, respectively.
http://www.zdnet.com/latest-os-share-data-shows-windows-stil...What game developer say to themselves,
It looks like in 10 years, Linux and OSX adoption will _probably_ approach 50% market share. Therefore, the best choice for my new game, which will be released in 3-4 years, is to choose OpenGL
I'm not a game developer, but I would bet they are interested in where the market will be in the medium term, and there is no indication Linux/OS X will suddenly dominate within that timeframe.