The VI is stand-alone but not similar to Kontakt, or GS. (I think this is important to clarify).
It is NOT multi-timbral., you only get one instrument as a stand alone, which makes no sense in a real world situation, to have the VI run on a dedicated computer, you need a host application, the VI would then be a plug-in instrument within the host appl. , each instance is an instrument, i.e. one instance for your oboe, another instance for your cello section, and a third instance for your flute, ...etc.
So, a Host application is a must, to make any sense of a stand alone concept. Unless you want to run one instrument per computer [:D]
Well, this is my understanding of the VI, so far.