The major reason for this is that they didnt have to code for XP, IE9 totally drops support for the OS which is a good thing. Now if only they would actually speed-up DX to function like the console version (yes DX 360 is superior to DX11 because it handles draw calling faster which allows for better handing of duplicate objects like trees on the CPU). Otherwise OpenGL 4.2 better be standard for all PC developers.










