Re: is the nvidia driver falling behind?
I also see that the main thing that is missing is a fbdev driver. That should give you the features of KMS. I guess one problem here would be the needed changes to the installer because the driver would be in use even if X were not started…
XRandR would be nice but is no real show stopper when I consider the features of NVIDIA X Server Settings and dynamic TwinView.
I can not complain about XRender performance.