3D was never going to take off. I think I have 1 3D DVD from 2005 and that is it. It was fun to watch Shrek in 3D but that is about it. Just not bothered
4K HDR will kick off but wont fail though. Once people see it they really want it. But there is so little out there atm that support it in terms of TVs and content providers. Even then the content.
Unlike 3D, it is not a gimmick, it is evolution of home cinema and HD/UHD broadcasting.
Betting £5 on it.
Do we have to show up in the UK to get that (funny L symbol)5?
The one thing with 4K is that there are a large number of people who like the big screen, and that would support some 4K sales. Personally I've not upgraded my 720 'native' TV screen to even 1080(ip)... But then I don't position my viewing a football field's worth of distance away...
In terms of Broadcast... the real deal with implementing ATSC-3 or DVB-T2, which has higher resolution capabililty, is... more subchannels at reduced resolution...
In the US there has been a great amount of TV band channel 'repacking' which is to say, combining what use to be separate stations and transmitters into one transmitter, with the separate stations on a subchannel.
As for content providers shooting in 4K... could be sort of an ad gimmick or future-proofing, having been caught out on the NTSC/PAL resolutions of yore when the cutting edge went to 720/1080.
For my product, I watch a lot of content, purely for academic research purposes mind you... and one of the features of some HTML5 content is being able to see the bit rates that the media is being received, at. And often, even for 'HD' selection, the bit rate is below 5Mbs.
There have also been startling revelations from Netflix last year, that for content accessed via smart phones from providers like ATT, Netflix has adjusted the resolution/data rate to minimize going over the data caps that ATT has in place.
In a word, the industry uses for 4K suck people in, and then the reality is 'things are different'.
Most people don't spend time looking at performance much after they decide to get X service.