The Universe as a Projection: Consequences for Science, Technology, and Worldview

This article presents a comprehensive analysis of the consequences of the "Universe as a Projection" hypothesis, according to which the perceived dimensionality of spacetime is not an objective property of reality but a characteristic depending on the observer and their choice of description level G. The hypothesis generalises the holographic principle to all dimensions and integrates Donald Hoffman's interface theory with the Infinite-Dimensional Multiverse Model (IDM). In an accompanying comparative article, it is shown that Hoffman's approach and the author's do not oppose but complement each other, describing the interface of perception and the geometry of the multiverse as two levels of the same reality. The work examines potential consequences of the concept in the event of its mathematical formalisation and empirical verification. For fundamental physics, this implies a revision of the status of dimensionality, a new interpretation of dark matter and dark energy as "projection noise," and possible simplification of quantum gravity. In cognitive science, it opens the possibility of understanding consciousness as a mechanism of projection selection. In philosophy, it offers "projective realism" as a third way between realism and idealism. In technology, it suggests hypothetical prospects for holographic data storage, quantum computing based on projection, and interfaces for switching perception dimensionality. In the methodology of science, the G principle could become a meta-criterion for evaluating theories. The article concludes with a research roadmap and an invitation to interdisciplinary collaboration. All discussed consequences are hypothetical and depend on future confirmation of the original hypothesis.