Richard Huddy of AMD spoke at SIGGRAPH yesterday and mentioned that they've already been collaborating with Khronos over "OpenGL-Next" and "AMD has given the organization unfettered access to Mantle and told them, in so many words, 'This is how we do it. If you want to take the same approach, go ahead.' Khronos is free to take as many pages as it wants out of the Mantle playbook, and AMD will impose no restrictions, nor will it charge any licensing fees." This is according to our friends over at The Tech Report that were in Vancouver for the event.
It will be interesting to see in the months ahead how much of the next-generation Khronos API design gets modelled around Mantle. We're also still waiting for AMD to publish the Mantle API itself and offer up any other Mantle documentation for public consumption.
During the event it was also shared that AMD is sending Mantle into the workstation arena -- where OpenGL has long dominated -- too with currently working on a FirePro beta driver to support Mantle and reportedly they already have some workstation ISVs on board.