Why is that useful though? "It's like I'm really listening to a TV!". Isn't that what people try to avoid with expensive sound systems that offer surround sound?
With the AirPods + Apple TV content spatial audio makes it sound like the audio is coming through more than just the two channels. It's much more natural sounding that stereo in headphones.
I never claimed this was useful, I said I found it enjoyable and having had this headset for 3+ years now, I can say that - speaking for myself - this is not a "gimmick" that I've grown tired of or turned off.