I saw the demo of the 85" today, it was the Q900RA model, which I guess is the 2018 model. I asked some questions regarding e-Arc, model year etc., but since the tv was new, the salesperson went on to Samsung website to look for the info.
Anyways, in regards to the PQ - it is the sharpest looking LCD I've seen. Shadow details are fantastic, and there's depth to the image. I tried a few different modes: Natural was the best looking. Movie was a bit dull and Dynamic is a mode that I will never use.
The 85" is out of my budget, but certainly considering the 75". I'm waiting for LG E9 to be out and I'll decide between various options. After looking at this tv, I find it hard to justify going with a premium 4k LCD.
Sony A9F, LG E9, LG B6 (retired)