Better API's than DX.
Open GL. Don't know enough about GX2 tho. It's just for Wii U tho so maybe not even bring that up. Open GL tho. I think more developers prefer it. Esp Valve.
Used to be a HUGE landslide in favour of ogl over d3d. Now its pretty much just the ones whove been around long enough, and have the capability of writing their own effects libraries.
MS has done a frightingly effective job of 'killing the next generation'. Most every college you go to has free MS products for students to use, and thus lesson plans revolve around ms products. You would be hard pressed to find many schools that go in depth with ogl and writing your own libraries... They just teach you to use what daddy ms has provided them.
MS solved the problem of too many ambitious youth working together and making breakthroughs and then adding them to the open graphics lobrary faster than ms could keep up... By making the majority of the youth of the next generation stupid, lazy, complacant, and expectant.
It was... A catastrophic victory.