I thought I’d open a thread on this for folks to post details on this as it comes out (and just as an FYI for those that hadn’t seen it yet and are interested). If you see something new on this out there, please do follow up with links!
Just announced publicly a few days ago (this was NDA-only at SIGGRAPH), NVIDIA announced a new variant on the standard GPU graphics pipeline, supported in Turing, which replaces the frontend geometry stages with two new shaders: the Task Shader and Mesh Shader. Reportedly, this offers much more flexibility in how geometry is sourced or generated for rasterization.
No GL-specific info out there on it yet, other than that NVidia says this (unlike RT Core access) will be supported in OpenGL.