How far away do you sit from your TV?
I sit about 8' away from my 65" Sony 4k... and I can _definitely_ see the detail in a good 4k stream. Try watching something at 4k for a while (like Planet Earth 2 on Netflix) then force the ATV 4k into 1080p and go back and watch. It will look at all "fuzzy" and lacking details.
Not too mention the big difference in HDR. Try watching something good with HDR (Stranger Things on Netflix is pretty good)... then go in and force the HDR off on your ATV 4k... big difference!
If you're not seeing the differences you're either sitting too far away, have eyesight issues... or have something wrong with your setup!
[doublepost=1517615420][/doublepost]
You mean DTS-X, right?
I have a good Atmos/DTS-X setup (ceiling mounted speakers above the couch)... and of course I love watching UHD Blurays that come with Atmos/DTS-X soundtracks... but I have to say: my Onkyo receiver does a damn good job of taking 5.1 sound and figuring out what to put in those overhead speakers using either Dolby Surround or DTS Neural-X (I prefer DTS Neural-X from my testing).
When I first built this new setup with 4k HDR TV and Atmos sound system... I was hesitant to watch good movies on ATV since they lacked the true soundtrack. However, I've quickly turned around on that.
Yes: I can tell the difference between the HD sound streams and the 5.1 compressed audio I get from my ATV 4k... but the difference is not enough to keep me from recommending an ATV 4k for anyone that has a 4k TV (no matter what your sound preferences are). Just gaining the HDR capability alone is enough to justify it.
[doublepost=1517615799][/doublepost]
Here is a list of 4k stuff on Netflix:
https://hd-report.com/list-of-4k-ultra-hd-movies-tv-shows-on-netflix/
And Amazon Prime Video
https://hd-report.com/list-of-4k-ultra-hd-movies-tv-shows-titles-on-amazon-video/
There is plenty there to keep you going for a long time. If you get bored... hop out to the iTunes store and pick any of these:
https://hd-report.com/list-of-4k-hdr-movies-on-apple-tv/
And things are accelerating _quickly_ since the ATV 4k came out.