According to the release notes, the new driver, it's claimed, will provide the optimal gaming experience for Mass Effect: Andromeda and Rock Band VR games, as well as adding or updating SLI profiles for Dead Rising 4, Deus Ex: Breach and Mass Effect: Andromeda.
The driver also adds support for Dolby Vision for games, which is not a big deal since we are yet to see any monitors that are equipped with such support. Of course, those that game on high-end TVs, which come with Dolby Vision support, might like this feature.
Unfortunately, it appears that the new Geforce 378.92 WHQL driver does not fix any bugs other than those already fixed with previous Geforce 378 release drivers.
As always, you can download the latest Geforce 378.92 WHQL driver via Nvidia's dedicated drivers support page or automatically via Geforce Experience software.