I only know what I read about ATSC 3.0 ,HLG HDR and so on and only what I can understand of all that and that might not always be right .
Nothing interesting for me OTA ouside of sports and 4 weekly procedural dramas on the alphabet networks .
.There are about 4 hours of primetime alphabet network programming I watch or record to D*TV Genie HR 54 DVR .
The rest feeding the 55" 4K HDR Sony in here is Roku .The Sony TV Android platform apps like Youtube ,Netflix,Amazon Prime up to 4K HDR ,Hulu Plus ,Vudu HDX ,Bloomberg, Android Kodi,2160p Windows 10 and so on , 217 Installed Roku Channels in the hockey puck and my media drives up to high bit rate 4K HDR eye candy and stock footage and OTA locals for sports telecasts or the 4 Prime time shows .
Not surprised that traditional TV viewing is declining ,the alphabet networks are deliberately ignorant deserts devoid of much beyond rubbish for the poverty stricken huddled masses ,mindless revisionist history education oppressed proletariat and the PC brainwashed snowflakes .
ATSC 3.0 changes nothing here beyond what I watch out of that ignorant intellectually devoid desert.
It may change some local major league sports or Stanford and UC ball if they are on locally and the 4 alphabet network shows.
TBH HDR ain't always all that and most of the time it isn't outside of an HDR Blue Ray and even those vary and can be from 2K intermediates anyway .
HDR varies from excellent to rubbish with any given production that may just as well be having me on my 1080p Roku instead for the same program or movie if the TV Anrdoid browser in my 4K HDR Sony XBR won't spring me out from locked in HDR jail on a given program , .it doesn't always turn HDR on and off or turn it off when it turns it on, ever seen a solarized weather channel babe ?
This TV is HDR 10 only .I 'm sure My PC can work around that with the right HDCP 2.2 HDR d/GPU if I don't upgrade this TV like I usually do at ~2 years maybe 3 this time ,I'm 15 months into this one now and it's doing very well against 2016 HDR product and its better than a lot of it even the same 2016 Sony .
Upgrading bt 709 rubbish to wide color ~DCI in the Sony XBR is the imperative here given the state of HDR and why I bought it along with the HDD and IPTV hires eye candy and decent 4K Youtube which is getting plentiful now .
If you have 4K WCG HDR or 4K SDR with the piss poor blue LED lamps with yellow phosphor and poor color volume because of that like any blue lamp LED here is an eye candy spot for downloads, lots of TV factory demos and so on up to 4K HDR and 8K.
I have all the good stuff there and lots of other good stuff on my hires eye candy HDD's .
Major free 4K eye candy downloads
http://demo-uhd3d.com/index.php