Well with the invention of DX10 being limited to only one OS in the Windows family, I don't see OGL being superceded too fast. First of all, DX9 apps run like crap next to OGL as of Vista RC2. Most people are saying that's because ATI and nVidia don't have their drivers up to scratch for Vista yet and that will change after Vista is released proper. I'm skeptical. As far as being a developer goes, with a keen eye on Vista, it seems to me that if one isn't going to embrace DX10, then OGL is the clear choice.