"...it’s worth noting that the UN40KU6300 offers true 4K UHD resolution of 3,840 x 2,160 pixels.
So does nearly every 4K TV on the planet now like my 4K HDR 1000 Samsung QDOT UN 55 KS 8000 in her on the wall and my 4K HDR Sony Triluminos X850C here out in my family cinema room
OTOH only my Samung UN KS 8000 is real deal HDR 1000 certified and 1000 + NIT luma power here ,the Sony is more of a wide color 4K SDR TV
My Samsung = can do 1474 NIT and tone map to 6000 NIT ,AFAIK HDR TV content can't even do that yet but tone map only to 4000 NIT with the usual 100 NIT mean and averages like 4K SDR and 2K HD mean and averages but up to 1000 NIT or a little more on HDR transient peaks and highlights in the HDR content but below tone mapping .
My Sony = 420 NIT HDR and SDR peak no match for the 1474 NIT Samsung UN KS 8000 here kinda like your UN KU 63000 ,same thing no real HDR but a nice 4K SDR TV .
Not quite accurate there. The term "true 4k" specifically refers to the professional and cinematic resolution of 4,096 x 2,160. The "UHD" moniker (which is NOT "true 4k") is a consumer grade resolution, the aforementioned 3840 x 2160. The big box stores and online retailers still stamp the "4k" on everything that is UHD, but this is largely considered false by the A/V community at large and is really nothing more than an advertising gimmick used to sell TV's to those who don't know any better.
Look it up...
https://www.extremetech.com/extreme/174221-no-tv-makers-4k-and-uhd-are-not-the-same-thing
You are and your web source are for lack of a better word
incomplete here and 4K cinematic resolution won't be any better on a 4K UHD TV panel unless it's a large cinema theater screen size .The difference is trivial as it applies here and the important thing is what see we from where we sit and that small difference is nothing as it applies here but you web blogger source sounds like only ignorant parroting of what he read anyway .
There are a number of 4K resolutions but for UHD TV panels outside of the few odd IIRC Sharp Display 4096 × 2160 TV panels some years back , TV manufacturing companies ,TV and TV media content producers ,ITU standards committees ,FCC (ATSC 3.0) and regional standards committees have hava all ratified (4K) -
Ultra-high definition television @ 3840 × 2160 1.78:1 (16:9) 8,294,400 pixels as the prevailing standard and up to HLG HDR for ATSC 3.0 linear broadcasting. IPTV can be HDR-10 , (HDR10 + active HDR maybe soon) and or DV HDR and maybe active DV HDR soon .
4K UHD TV 2160P (16:9)
3840 pixels × 2160 lines was a nod to compatibility with 2K 1080p (16:9) screens and so on and a fair compromise all around
HLG HDR is for linear broadcasting I believe my new Samsung 4K HDR TV has that already or will see it in a firmware push but no ATSC 3.0 RF tuners ha ha .
This has nothing whatever to do with box box stores or marketing they just sell and market product the manufacturers put on the shelves unless it's a OD or re label product from a store chain like the Best Buy exclusive Insignia /Dynex TV OD product lines but all that would have to be in conforming standards for a TV anyway ☺
The important thing is the TV /media content and TV panel TV being at the same resolution without re scaling here as you would with anything below 2160p UHD on a 4K TV ,
LOL Cinema production 4K 4,096 x 2,160
or other cinema 4K resolution digital intermediates for TV content are scaled down to 4K TV 3840x2160 and as as often as not up from 2K digital intermediates for 4K TV 3840x2160p Content and 4K Blue ray and they have way better scalers than our TV's or media players
Caveat emptor when you buy or even watch streaming IPTV 4K protected studio movie content or 4K Blu ray ,the provenance , cameras used and % of 4K production shooting and 4K D.I. (digital intermediate content ) used on any given film they have there is is at Blue ray .com .
You will see a lot of that is entirely or partially from upscaled 2K D.I. and HDR is apart from resolution at that point but implied in 4K HDR HDR TV and I gave seen Amazon video 4K HDR drop down to 1080p HDR here more than once due to net congestion from AWS through the CDN hops ..........LOL
Like 3D and 2D % in a 3D film shoot ,You would be surprised at how much 2K intermediate content and GCI is in a 4K cinema production or UHD Blu Ray even at the movie theaters from thier cinema digital packages because of that today trus`me
Ultra HD
4K UHD is a resolution of 3840 pixels × 2160 lines (8.3
megapixels,
aspect ratio 16:9) and is one of the two resolutions of
ultra high definition television targeted towards consumer television the other being
8K UHD which is 7680 pixels × 4320 lines (33.2 megapixels).
4K Format Resolution Display aspect ratio Pixels
Ultra-wide-television 3840 × 1600 2.4:1 (
12:5) 6,144,000
DCI 4K (
native resolution) 4096 × 2160 1.90:1 (256:135) 8,847,360
DCI 4K (
CinemaScope cropped) 4096 × 1716 2.39:1 (1024:429) 7,028,736
DCI 4K (
flat cropped) 3996 × 2160 1.85:1 (999:540) 8,631,360
Ultra HD -wikipedia-