This is a really curious analysis for me, as I'm a former owner of a 280X and a current owner of a RX 570 (I only got the 570 because the previous card died and it also had some really ridiculous bundled games promo).
There's something that Richard probably does not know about the 280X. At some point, newer driver updates made performance worse for this card. Not that it matters much for this video I guess but I still wanted to point it out. :P
RX 570 is amazing, I keep parroting it. I got an 8GB one for 149 (129 if I'd bothered to send in the rebate) and for my needs, it fit the bill amazingly, and absolutely blows away anything else at that price. Hell even now, I notice it will play Gears 5 at ultra at 1440P (my monitor) at 30 FPS, and I dont mind 30 FPS. It also plays Destiny 2 at high at 60 FPS at 1440P. I just wanted something cheap to chuck in my computer for very basic gaming capability, instead it's actually competent! One downside is it's pretty loud, but I can accept that.
If I'd walked into a big box and bought Nvidia from Best Buy. I literally would have ended up with a 2GB GT1030 or something for the same price, LOL.
Sorry just saw another chance to gush over my 570 LOL.
The video...I mean yeah. About like I''d expect. Even "comparative" 14 TF though is only ~2X Xbox One X. You aren't getting any order of magnitude there. So something PS5/X2 can do at 4k, X1X can do at 1440P, basically, for reference. And as far as RAM, I'm not expecting X2/PS5 to go higher than 16GB there either, too expensive, so again they wont run away from the X.
Ignoring of course the vastly superior CPU's likely present in next gen. Also SSD optimizations will be exciting.