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The question may seem straightforward, but the answer can be very complex, leading to a whole series of issues related to the target audience of hyper-realistic architectural renderings, as well as to what their goals are.
Even though the target audience may not be a client and the project may not actually be built, one of the main virtues of this style of visualization is that it delivers an image very similar to reality. For this reason, hyper-realistic renderings are often confused with photographs of built environments.
Vessel Public Landmark / Heatherwick Studio. Courtesy of Getty Images / Forbes Massie
This was possible due to a process of constant improvements in technology, software, and rendering techniques, together with the advent of visualization studios that specialize in the production of 3D models and hyper-realistic images.