DrJay24's point is more that, assuming PS4 is capable of a lot more than XB1 is achieving due to having more GPU power, it would have been nice for the devs to crank up the Graphical Whizz a bit.Uhh? You are getting more frames pr second, the PS4 is still ahead even with Microsoft helping Blizzard to achieve the 1080p checkmark.
But as you say, devs aren't likely to scale up the visuals (depends whether the PC version has higher quality options beyond the current-gen consoles). Furthermore, if the target is an absolutely rock solid 60 fps, you need the average amount of effort to be well below that, and the hardware to not be stressed. Then, when things get busy, the hardware can manage it in time and the framerate doesn't take a hit.
That's where the MP stress test is going to be important here. It'll show if the PS4 is managing only a small increase in framerate, or substantially more, which'll be an interesting tech preformance comparison.