Just a random thought or two.
I can understand the goal of some "natural" sounding speakers for well recorded small-scale acoustic music, and even then with many qualifiers.
But, since all movies use foley artists to create the sounds artificially after-the-fact, the term "natural" sounding seems, to me at least, to be somewhat of an oxymoron.
Pleasing, or possibly good-sounding I can see, but I think natural is a bit of a stretch.