I just bought C7, went and looked at QLED vs OLED in the showroom. I didn't wait for the 2018 series - most of the improvements looked to be software (AI on my TV... ok), ~probably~ a similar quality screen, and no HDMI 2.1, so no point in waiting. Colors popped a bit more on the QLED, but yeah, realize that was in a showroom with crazy settings. OLED black and darks crushed it. I'm not too worried about retention - it could be a problem, if it does become a problem, I'll deal with it then. Just like I would any problem with any other set you would buy - nothing is perfect. In the mean time, I'll enjoy my C7. I can't see QLED being terribly competitive in the long run, but with a big name like Samsung behind it, crappier tech has won out in the past. It blows my mind that right now you can get OLED for less than QLED though. MicroLED could be a thing though. But I'm afraid it will be like OLED has been for monitors - always on the tip of everyone's tongue, but never any real traction. I know a lot of people here would kill for a smaller 30-42" OLED monitor.