Here the link to a video, about a new instrument: the physical modeling of the Cello enable the recration of several gestures of a real cello player, as the bowing (direction intensity position speed etc.) and fingering (string vibrato portamento etc.).
To make it realistic I take a real performance and realize the midi track according it. You may preview the result:
Re: The Swan, C. Saint Saens (solo Cello and Piano)
Yes Tom it is available: it's a virtual instrument (then no saples and patch change for different articulation, but just controllers in real time, or in the sequencer track, to get every possible sound).