I want 65" 4k, OLED, HDR, and 20ms input lag.
For those on the fence with 4k, forget when you'll get to watch "The Big Bang Theory" in 4k. These TV's do a great job at upscaling, which is especially noticeable with text/dashboard/UI stuff. Even though the colors don't compare between the Vizio M and my recently returned EC9300 OLED, the Vizio M presents a much cleaner HUD in Halo, and Dashboard for the XBOX. It also does a great job of making 1080 Netflix look 4k.
Now that my EC9300 has been returned (Amazon no longer stocks it, so no replacement), I'm trying to figure out which way to go. I want low input lag, and 4k. I've been spoiled by OLED, so PQ is pretty important now too. The low input lag rules out pretty much every OLED except the 9300. If you are playing Halo 5 online, the 40ms lag is definitely noticeable (floaty).
It's unfortunate that we can't go out and buy a TV that has it all going on, but I guess that's how it always is. At this point I'm thinking that I'll either go with the 65" JS9000 (which was the only TV in BB Magnolia room that was remotely comparable to the OLED and has 20ms input lag), or I'll get the 55" LG EF9500 (which is 4k, has HDR) and pair it with a BenQ monitor to game on.