I attended a Webminar from Khronos were no one in the panel understood why the research community would want anything beyond C to program GPUs.

Meanwhile NVidia was adding C++, Fortran, PTX, supporting other programming language communities trying to target GPUS (Java, .NET, Haskell,..).

Making it as easy to debug GPUs as modern graphical debuggers for CPUs, building libraries,...

Intel, and AMD together with Khronos did this to themselves.