HDR10+ is in a very weird situation now.

It is assumed 2016 SUHD TV will get HDR10+ capability via Firmware update, *however* where the HDR10+ is limited to in app support or also via HDMI inputs is subject to much debate and heated discussion.

There is no confirmation in regards to HDR10+ via HDMI hardware support update for 2016 SUHD, and even the 2017 QLED/Premium UHD range.

All that is confirmed that in-app will get HDR10+ update in an unspecified time frame due to Amazon Prime and Samsung partnership in pushing for HDR10+ support.

And yes there will be no Dolby Vision, Samsung don't want to pay Dolby royalty

KS7500 = KS8500, rtings got review on this model. Seem like its picture better than SJ850t.

KS7500 is a very nice TV from last year, however not everyone like the curved screen, I'm one of those. However, it doesn't mean that the LG is not good. Overall the features and technology behind the LG is more superior, Nanocell is as superior as the Qled and Dolby Vision is included. The WebOS is one of the best smart TV OS. It is a battle between VA and IPS panel, VA will win as picture quality is always related to native contrast and VA panel come with much higher contrast and it is easier to boost higher brightness without worrying too much about light bleed issue. This is required for HDR10 at 1000 nits brightness. Color from the KS7500 is attractive but it is actually a little over saturated, if you like more natural colors, it will be the LG. Between the 2 most peoples will take the Samsung, except those who don't like the curved screen.

Dolby uses 12-bit color depth for cinematic Dolby Vision content to avoid any noticeable banding but the format is agnostic to different color depths and works with 10-bit video or panel as well. In fact, Dolby recommends 10-bit color depth for broadcast.

Dolby Vision is designed as an end-to-end HDR process. So from capture through processing and into production, Dolby Vision is designed to preserve information that was originally captured and pass it on. The aim is to give you an HDR experience that's closer to the original by supplying more information.It also tells the display device how bright it should be, rather than provide one value as HDR10 does which stay static, and it can do this for every frame. The idea is that it allows creators to ensure that what you're seeing is what they intended. There is no 12bit TV panel that you can buy now, not even the OLED from LG, but you will get all the benefits or advantage of Dolby Vision even on a 10bit panel.
I think it depends on the sellers, some sellers provide 2+3 that fully covered by the manufacturer over the 5 years with onsite support. The cost for the +3 years they claim back from insurance.

The biggest difference in HDR10 VS DV would actually be the dynamic meta data which actually data encoded in the video signal to tell the TV for this scene, what kind of color/brightness/etc the TV should display, while HDR 10 is static. HDR 10 will give instruction to the TV at the beginning of the video, and the data would carry out throughout the whole video.

Download TV/Monitor screen test files to check for damage.. See if you can get into the service menu to check how much time it has spent switched on. Once satisfied no defects, switch to Movie mode and calibrate as best as you can.

Nope... Not from Tizen app store.. Here you go.

You can't.. Have to get the old remote. The IR only one with all the buttons on it. Some borrow, others go out and buy.

Well most Samsung remote will work (I have a Samsung TV from 8 years ago and still work with KS7000). So you just have to procure it somehow haha.

Other remote that might work will be Samsung BluRay players that has a TV button on it. (my samsung HT remote also works with KS7000)

IINM if your phone has an IR Blaster, you can also access the service menu through it.

You can also mirror your phone to the TV, and run those LCD tester software, usually cycling between Gradient, White, Black, Red, Blue, Green full screen image to check for any weird or huge ass pixel death.