I'm not convinced that's the whole story. Even old movies converted to digital fall into the uncanny valley. Try watching bluray Godfather for example. Looks staged.
You might want to check the settings on your Blu-ray playback system, because the Godfather Blu-ray is one of the more "filmic" transfers I've seen, preserving the grain of the film print rather than attempting to "clean it up" with digital noise reduction, and it should play back at the original 24fps frame rate on any system that supports it.
