This is actually a copy of the post I made in the Apple TV owners' thread as I found this thread which seems more appropriate afterwards....
I received my ATV 4K yesterday and hooked it up to try it......but I'm profoundly disappointed!
Firsty the need to manually change the output format for HDR and non HDR content is really a pain since I'm used to other boxes which do that automatically along with auto framerate! At least if there was the possibility of getting a direct link to the option instead of navigating the menu all the time...you could argue that leaving the settings open on video mode could be a shortcut.....but I find this as inelegant as Apple finds inelegant 3/4 seconds of blackout for the output format switch!
Leaving everything in HDR is absolutely a no go since the results are awful outside the apple store and bad within.
But this could be accepted if it was the only limitation of the box.
My major disappointment is the quality of the itunes store 4K movies......
Bare in mind I just bought one title: Alien Covenant since I also own the UHD disk and the HD blu ray that comes with it and I was able to make a comparison. I don't argue that there might be better results with other titles but selling such an awful copy of the movie on the store for more than 2$ is beyond my comprehension.
I have an 2016 LG C6 which certainly is not as kind to low quality streams as LCD TVs but I guess that elegant Apple should have one to test and take it into account since Oleds are certainly on the buying list of their preferred customers.....
I would rate the Apple version of Alien Covenant very low on the quality score, insufficient for the least. As usual with the bright scenes there is no big problem and the stream is absolutely on par with Netflix, Amazon etc (TV app) but in the dim lit or dark scenes it's ridiculously bad.
Guess what: Alien is a sci fi space movie...space is dark (actually empty space is quite black!) and many settings of the film are also dark or very dark.
In the actual space scenes you cannot see stars but just flickering of multicoloured macro blocks and noise everywhere as in most dark corners of even well illuminated scenes...when the alien Xeno is finally disembarked from the covenant with the help of that huge "mining" truck I actually couldn't see the truck dropping toward the planet beneath but it just looked like I lost my antenna on the roof!
I understand streaming and everything related but frankly I cannot limit my vision to only well lit movies throughout. Luckily I'm not a horror fan!
I don't know if there's a solution (bump up bps on dark scenes etc) but I will not buy another 4K movie if this is the quality to expect, I'd rather spend the extra money for the disks and be satisfied with the vision.
Netflix and others seems miles ahead to me for what I've watched so far though they also have their share of problems with the dark tones / scenes.
I sincerely hope that someone will wake up someday and tweak the H265 codec for such situations.....
Another issue is the renditions of blacks (always about Alien) which I also find problematic because they are really dark grey and contrast goes down the drain......
I actually prefer to watch something in HD and SDR rather than the 4K HDR stuff on the itunes store (if this is the quality across the board) even if they certainly look a bit softer, the dark scenes are much better.
All of this is really an apple choice problem (itunes store or apple software) rather than the ATV 4K itself as using Infuse 5 to watch other things (non streaming) I find the quality in 1080p SDR on par with other boxes (Zidoo X9S, Dune Solo 4K, Zappiti Player) and the actual TV upsampling (since all these boxes do both auto resolution and auto frame rate) with very minor differences which go really unnoticed on a 55".
Before you ask; I have 100 Mbps connection and the stream was in 4K. TV settings are OK and everything is rendered correctly in the menus and tests patterns through the ATV 4K.
Off course there is no comparison whatsoever with the UHD or the Bluray disk, but this was not the point. I just checked that the "noise" was not there in the movie itself and it wasn't. Plus the UHD disk HDR has better blacks so I don't understand why the stream should be inferior....black is black....it looked like the blacks were elevated, this didn't happen with the SDR itunes stuff.
Last problem is that my remote disconnected itself at least 6/7 times during 4 hrs of use. Battery was 100% and I was only 12 feet away from the ATV. It did usually reconnect within 10/15 secs but a few times it took nearly a minute.
Overall I would send back the ATV 4K if I didn't have another TV to connect the old 3rd gen I substituted.
I hope that things will be better in the future with updates and streaming improvements because the future is "dark" if physical discs fade away and this is what we are left with.......
Unfortunately I cannot afford Kaleidescape....