Um, I said TV, and all three of these are monitors. Niche monitors at that too, none of them are even in stock.

Furthermore, how many console gamers do you know who have a 55" Alienware monitor in their living room? I did say consumer TV as well, ya know.

That's a passive cable and would require DP++. Funnily enough it would also require a HDMI 2.1 capable driver.

That probably won't work. It will get basic video and maybe audio through, but not features like VRR, which is why you'd care about HDMI 2.1 support at all