Serial works are those works that require time to experience and typically appeal more to our auditory sense than visual one. All art can be appreciated over time, but certain works require an amount of time to experience fully. Music and literature are the primary serial art forms. But, film and theater productions (plays, musicals, operas, dance forms, etcetera) have a serial, as well as visual component.
All works of art will be better understood if more time is taken to appreciate them, but while our perception of it is changing the work itself is not changing. Walking through or around an architectural work will allow the viewer to see more of what it offers, but the new room into which one walks does not change before or after that person walks through it.