Architecture has traditionally dealt with spaces that we can conceive and build. What if, however, we can conceive of, and experience spaces beyond what we can build? There is indeed a class of spaces that are perfectly sensible, however impossible to materialize in the physical world. Virtual reality and spatial audio, allow us today to create synthetic spatiotemporal environments that extend sensibilities already present and relevant in architecture and music. Building on latent sensory potential, works of sculptural music or virtual architecture uncover a new paradigm and a vast domain for experimentation. More importantly, this expanded field of architecture unveils an equally latent and unexplored aesthetic potential. Such experimental and interdisciplinary approaches on post-physical-world immaterial environments often challenge traditional notions of architecture. One thing however is for certain: virtual and mixed reality environments are the architecture of the future to come.