The thing is, intensity and time delays only make up a small component of the audio cues that make up binaural sound. If the position of the ears were the only factors, then it would be impossible to tell the difference between noise in front of you, above you, or behind you. Turns out the shape of your ear helps to imprint the necessary cues on incoming sound, and that's what makes binaural sound so hard to synthesize.
And whatever Product they are selling certainly is remarkable, but notice how the Foreword/Backwards/Above distinction was pretty weak (IMHO), so they are still having difficulty emulating the shape of the ear.
"Well, if I am not drunk, I am mad, but I trust I can behave like a gentleman in either
condition."... G. K. Chesterton
“questions are a burden to others; answers a prison for oneself”