Motion blur doesn't really work in that way on any device, but what you're missing is that the content's captured frame rate has a relatively important relation

Motion blur doesn't really work in that way on any device, but what you're missing is that the content's captured frame rate has a relatively important relation to the display frame rate: You can't usually change one & not the other without making everything look worse, at least to most people, and this is what a lot of modern TVs do. Naive interpolation of inter-frame content is awful, is what a lot of TVs do to implement their smoothing feature, and is why everyone complains about it. The reason a lot of people hated The Hobbit may be partly because of this problem: It was shot at a 270 degree shutter to try to get a bit more motion blur back into each frame, which to a lot of people felt strange.