I only managed to check 43 inch 1080p of Sony and 4K IPS 43 inch of LG.
LG for some reason had poor brightness, it could be bad settings at display but I wasnt able to spot things during night scenes.
Sony 43 inch 1080p (at Sony World, Centaurus Islamabad) was best among bunch. Picture wasnt as sharp as 4k but it had no problem with colors and angles.
EcoStar had decent picture quality. I couldn't see them in depth because they were placed in relatively darker ambiance and almost every LED appears better in dark. Strangely, I was able to note that EcoStar's something-921 model had better viewing angles (50 inch) than its TCL competitors (P6/P65). TCL ones are absolute mess when viewing from sides (50inches+).
Also looking forward to see Hisense somewhere. They claim to offer OLED tvs around 80k.