I was badly burned by Microsoft's end-of-life announcement for Kinect V2 sensor after completing an app that was to be marketed. The SR300 has been around for a while and the new D415 and D435 are expected to be available soon but there is no information on any SDK that would be available for it. Will any new SDK provide cursor control, mouse click/hold functions? I'm trying to do my due diligence to avoid being burned again.
I refer you to your question on another message that I answered.
As far as I know, there is not yet an equivalent in the new SDK to the Touchless Controller in the 2016 R2 SDK that provides the mouse-like camera control features you described for the SR300.