[noggin]

(Technically you could probably get an Apollo Lake to do HDR replay IF you used something like an HD Fury Vertex to inject the right HDR EOTF and colour space metadata, and had a 10 bit path through Windows?

 I have never seen a HD Fury Vertex but my guess is that it could enable HDR support even on Apollo Lake. You just have to inject the metadata into the HDMI stream somehow and that's what that device seems to do.   

I have one - the GUI lets you inject custom Infoframes etc. into an HDMI stream - including adding ST.2084 EOTF flags, selecting Rec 709, Rec 2020 or DCI-P3 Primaries, specing the White Point, and adding the HDR10-style metadata for Max/Min Luminance and MaxCLL and MaxFALL.

It has a PC GUI that lets you do this - and also has a comprehensive OSD and OLED display in the device to detail the precise properties of input and output signals etc.  It's a very useful bit of kit. Not cheap, but incredibly useful.  (It also lets you create custom EDIDs to get sources to do what you want them to)

https://www.hdfury.com/docs/HDfuryVertex.pdf