[A-Swiss]

I'll keep my HTPC and will give him an upgrade with a GTX1060 in order to get HDR Video played

I don't think Kodi can utilize nVIDIA's API for HDR playback. Heck.. not even madVR has been updated to utilize the API.

Probably not in Kodi. I'm fine with the capabilities of Kodi offered in V17, but I wanted tu use my HTPC also for Netflix (Instead of switching to my TV's Smart Function each time)
On my LG OLED, netflix runs with HDR & Dolby Vision.

According this article, GTX1060 has a HDMI 2.0b, HDCP2.2. Interface.
in terms of hardware functionality, the new cards will add the following to what was already available in Maxwell (12-bit color depth, BT.2020 wide color gamut, SMPTE 2084 (Perceptual Quantization), and HDMI 2.0b 10/12b for 4K HDR):

4K@60hz 10/12b HEVC Decode (for HDR Video)
4K@60hz 10b HEVC Encode (for HDR recording & streaming)
DP 1.4 ready HDR Metadata Transport (to connect to HDR displays using DP)

In addition to this:
NVIDIA Pascal is also the first GPU to allow 4K streaming on PC via Microsoft’s PlayReady 3.0 standard. Dave Bossio, Group Program Manager at Microsoft, said:

The Pascal GPU family meets the highest standards for PlayReady 3.0 (SL3000). Meeting these stringent standards will enable the Pascal GPU family to play back the best premium video content on Windows PCs.

NVIDIa is also working with Netflix, so you’ll be able to do 4K streaming of their library if you own a Pascal GPU. Speculation is that PlayReady 3.0 will be needed for UltraHD Blu-ray content, too.

check this article: http://wccftech.com/nvidia-pascal-goes-f...or-movies/