A gesamtkunstwerk is one of those wonderful German compound words meaning "total work of art." It is a term coined by K. F. E. Trahndorff in 1827 and later popularized by Richard Wagner.
It refers to a creative work that synthesizes multiple art forms, such as music, drama, and visual arts, into a cohesive whole. Originally associated with opera, it has since been applied to various fields, including architecture and multimedia art. Prominent examples include Wagner’s operas and Art Nouveau architecture. The concept aims to create a unified artistic experience that transcends individual mediums.
Today, in English, we might express the same sentiment by proclaiming something "the total package."
A couple of examples, in my opinion, would be the movies Minority Report and Mad Max: Fury Road.