Not sure if anyone has tried Dolby Vision yet for games, but I spent a bit more time with it a few nights ago.
It looks notably better than HDR10 in ME:A, but there is a huge trade off for input latency. I'm not sure if there's some additional processing that's taking place for Dolby Vision, and unfortunately I don't know of a single other game to test, but it is borderline unplayable.
LG C7 btw. Anyone else mess with this yet?