"Multi-View Rendering enables next-gen headsets that offer ultra-wide fields of view and canted displays... A next-generation version of Single Pass Stereo, Multi-View Rendering doubles to four the number of projection views for a single rendering pass. And all four are now position-independent and able to shift along any axis. By rendering four projection views, it can accelerate canted (non-coplanar) head-mounted displays with extremely wide fields of view."
The difference to StarVR One is that nVidia draws the 4 projection views in a single rendering pass. StarVR One uses 2 pass rendering. So it seems Multi-View Rendering is more efficient.