michael.betancourt@gmail.com
www.michaelbetancourt.com

My own feeling is that VJing has become a "general term" for the performance of imagery in time as either visual accompaniment to music or on its own. The important part of this description is the 'performance'--that the imagery shown is the product of human actions being done live, not shown via a prerecorded, continuous movie. I like this description because it doesn't require any specific technology be the source of this imagery--analog, or electromechanical systems (such as the historical color organs) "fit" its requirements just as easily as modern digital systems of all types do; it can include prerecorded bits arranged and used in conjunction with other things, etc. (as with Belson's Cinema Vortex shows or other early live spectacles).