Well, he was talking about
taking the shot...
Of course resolution matters, but the overal point was if it
changes the gameplay experience. I doubt any seasoned BF4 player would make a point that the resolution change between 720p, 900p or 1080p would actually be detrimental to the overal gameplay, unless perhaps for a PC gamer who sits up close to a screen at god knows what kind of uber resolution, using a mouse with a ridiculous high speed polling rate and equipped with a 4x ACOG scope on his SRR61 to sniper off targets sitting 300m away. (And yes, I play a lot of BF4...). Going from 720p -> 1080p would be a 50% increase in both directions. In other words, any object a pixel in size would be 1.5 at the higher resolution. If you factor in the actual viewing distance to the screen, the visual difference is even smaller.
I'd argue that at the typical screensize and viewing distance most people actually play their games at (hence, not sitting directly in front of their television sets), the resolution difference between 720p and 1080p is a lot smaller. I'd argue it's easy to obsess about these things on a forum since we browse using a PC/monitor with fixed resolution and close viewing distance, so upclose, we tend to focus on such details. In an actual gaming environment though, adding screensize and viewing distance, these details become far less apparent.
It's like arguing if your smartphone with a 5 inch screen really needs a FullHD resolution or even QHD. Yes, the text might be a bit sharper/smoother etc, but
really? There's a point where the screensize / distance ratio where a higher resolution yields little benefit. Certainly not detrimental to the overal
gameplay experience.
In other words; Xbox gamers can relax; Those games that they get to experience at slightly lower resolution are just as fun and immersive as what PS4 get. Or PS4 vs PC gamers (though there are probably bigger differences between how console and PC gamers experience their games).