The new changes for the NVIDIA 310.19 Linux graphics driver is support for configuring stereo support from the NVIDIA Settings panel, support for configuring the ViewPortIn and ViewPortOut from NVIDIA Settings, fixing the meta-mode book-keeping within NVIDIA Settings, and support for configuring rotation and reflection per display device from nvidia-settings.
That's officially the changes for this NVIDIA Linux graphics driver release... It mostly comes down to improving the nvidia-settings utility. Is NVIDIA improving their GUI configuration panel to help the new Linux users trying out the operating system thanks to Valve finally bringing their games over? It's looking that way, look for more usability improvements for the Linux desktop on the horizon.
The web-page for this new NVIDIA Linux driver release isn't yet available but the binary blob can be fetched from the NVIDIA server.