Gaming is fantastic, all the streaming stuff looks great and Disney+ has Dolby Vision content which looks incredible, not to mention Netflix 4k.
I can't believe how cheap 4k sets are getting.
Now if I could only talk my wife into the 77" LG OLED.

PK, re: gaming mode - thanks, MW and Madden look great, NHL 20 just popped a bit more on standard, I did mess with the gaming mode settings a bit though and figured out how to match the color. There was definitely noticeable lag out of gaming mode.