Piano Technology: Pianoteq
Pianoteq is a digital piano software, different from others because it uses a modeling technique for voice synth, and not samples, or other artificial synth techniques.
Here's the pianoteq home page: http://www.pianoteq.com/
Roland is the company that sells a digital piano using the pianoteq technology, called V-piano, selling for 6k.
Here's some vid explaning it pianoteq:
you can watch all the episodes here: http://www.youtube.com/profile?user=pianoteqvideos#p/u/6/U3KTHeupRUo.
Roland V piano