It might not ever work "like walking", but nor does a linear array of a bunch of miniature speakers in a pair of headphones work like spatial audio in the real

It might not ever work "like walking", but nor does a linear array of a bunch of miniature speakers in a pair of headphones work like spatial audio in the real world, but the brain figures this out fairly quickly. The question here is, and in some way the "art" or the creative side of the engineering puzzle, is when does this "feel good enough" for most users?