It dosent matter how easy the language is its a matter of how easy is it to implement from the programmer/ developers point of view. At the minuite they have a library of code =effect 1 which makes things a lot quicker and easier for them.
This extract from a larrabee preview say it all really.
"Game developers aren't big on learning new tricks however, especially on an unproven, unreleased hardware platform such as Larrabee. Larrabee must run DirectX/OpenGL code out of the box, and to do this Intel has written its own Larrabee native software renderer to interface between DX/OGL and the Larrabee hardware."
So if Intel has had to make its own renderer to interface for DX?OGL then you can bet its going to take some pretty persuasive arguments (or lots and lots of money) to make things change any time soon.
Mactronix