Well, this is better news than him being completely gone from driver dev which has been the situation for months now. He formally resigned.
Of course, this may have already been in the works and the reason he left to begin with. Either way, good to see him back.
Things seems about to be in a pretty good spot NVIDIA wise. I do not use any of their recent gear so I do not care directly. That said, it will be good to have NVIDIA working well with Wayland just to remove the substantial amount of noise NVIDIA issues add to that project.