When I wrote that article Sunday, it was expected the driver would be released on Monday as version 337.10. Well, it ended up coming out Tuesday morning as version 337.12, due to a last minute problem with their Linux driver. It was a day late, but all the other information in that article is spot-on about its overclocking capabilities, etc.
The big work is supporting overclocking for Fermi, Kepler, and Maxwell GPUs under Linux. Additionally, the NVIDIA 337.12 Beta has support for the GeForce GT 705 and GT 720. On the mobile side is support for the GeForce 830M, 840M, 845M, GTX 850M, GTX 860M, GTX 870M, and GTX 880M.
The NVIDIA 337.12 Beta also has many bug-fixes, reduced CPU and GPU memory utilization when using the EGL driver, support for new EGL extensions, and GLX_NV_delay_before_swap extension support. The new EGL Extension support is EGL_EXT_buffer_age, EGL_EXT_client_extensions, EGL_EXT_platform_base, and EGL_EXT_platform_x11. NVIDIA is still working on their Wayland support.
This new NVIDIA 337.12 Beta Linux driver can be downloaded at NVIDIA.com.