Nope,
There were at least 6 games benched without HDR. And they achieved the same gains in them. Also Wolf2 can't use FP16 on Turing, because FP16 is a part of AMD shader intrinsics available only on AMD hardware. Only an ignorant guy like Adored can make that claim and get away with it.
And NOTHING is wrong with benching a card at 4K if the card is targeted at 4K. You want to use use @1440p that's your choice, just subtract a portion of the % of uplift and there you have it.
Never said there is anything wrong with doing it. It's just like comparing Infiltrator with DLSS on vs a card that can't use DLSS. Its not a bad thing, but it is something people need to keep in mind. Its why you can't take this stuff at face value and you must look at it more critically. Nvidia's marketing team is a marketing team. They're going to do their job and make the cards look the best they can and use whichever marketing tricks work to do that. And. yes, that also means they are specifically picking games (and a tech demo) that can give the most wow factor.
Given the price the 2080 is effectively competing against the 1080 ti. I doubt that would have been as favorable of a comparison as going against the 1080.