Will I still be able to use Moonlight?
Not through Nvidia, but you can install sunshine instead, works just fine with moonlight.
Besides the number of greater features that sunshine has added, are there any performance benchmarks to compare the two? Like for 4K HDR @ 120Hz in terms of latency or efficiency in the graphics capture pipelines? Always figured Nvidia could be leveraging their proprietary driver APIs more effectively given they can optimize and control the entire graphics pipeline, end to end.