Does Nvidia’s Command List Extension Show OpenGL Next is Unnecessary?
While the OpenGL Next initiative at Khronos is ripping apart the API in the drive for performance, Nvidia has quietly shown how to add a high performance path to existing OpenGl with their Command-List extension.
Read a slide stack on it here.
Here they apply it to rendering large scale CAD models: video
One great advantage it has over OpenGL Next right now is that it exists and you can use it immediately. Code for an NV_command_list example is available.