A VJ [viˌdʒeɪ] is a performance artist who creates moving visual art (often video) on large displays or screens, often at events such as concerts, nightclubs and music festivals, and usually in conjunction with other performance art. This results in a live, multimediaperformance that can include music, actors or dancers as well as live and pre-recorded video. Also sometimes called "Realtime" or "Realtime Video."
Software (like Resolume Avenue) enables one to create videos, in real-time, mixing video and audio clips.
But as technology is integrated closer and closer to the center of our imaginative minds, we will be capable of "speaking" in multimedia -- a way that the field of VJ'ing has been experimenting with.