In practice, I think the kind of blur that happens when you're looking at a physical object vs an object projected on a crisp, lit screen, with postprocessing/color grading/light meant for the screen, is different. I'm also not sure whatever is captured by a camera looks the same in motion than what you see with your eyes; in effect even the best camera is always introducing a distortion, so it has to be corrected somehow. The camera is "faking" movement, it's just that it's more convincing than a simple cartoon as a sequence of static drawings. (Note I'm speaking from intuition, I'm not making a formal claim!).
That's why (IMO) you don't need "motion blur" effects for live theater, but you do for cinema and TV shows: real physical objects and people vs whatever exists on a flat surface that emits light.
In practice, I think the kind of blur that happens when you're looking at a physical object vs an object projected on a crisp, lit screen, with postprocessing/color grading/light meant for the screen, is different. I'm also not sure whatever is captured by a camera looks the same in motion than what you see with your eyes; in effect even the best camera is always introducing a distortion, so it has to be corrected somehow. The camera is "faking" movement, it's just that it's more convincing than a simple cartoon as a sequence of static drawings. (Note I'm speaking from intuition, I'm not making a formal claim!).
That's why (IMO) you don't need "motion blur" effects for live theater, but you do for cinema and TV shows: real physical objects and people vs whatever exists on a flat surface that emits light.