The five domains above, whose benchmarks are collected in Table 14.1, are a sample, not a census. Spatial intelligence is equally at work in fields this survey does not treat at length: virtual try-on and 3D e-commerce, immersive education and high-fidelity training simulators, security and surveillance, energy and infrastructure inspection, precision agriculture beyond the remote-sensing view of Section 11.2, and many others. What unites them, and what unites them with the headline applications of the preceding chapters, is that each takes the perception, reasoning, and generation capabilities of Part III and specializes them to the geometry, sensing modality, and constraints of a particular slice of the physical world.