Its normal that you'll find screenshots that look very good and ones that look very bad in a game with a huge open world, diverse terrain and fully dynamic day/night and weather.
There are places where things like the reduced NPC counts and the low shadow draw distance aren't noticable, but overall I notice it a lot.
"By far" is an exaggeration. The difference between Ps4 and XboxOne isn't big.
I also think that the framerate issues on XB1 might be easier to fix than the ones on Ps4.
Ps4 straight up drops below 30, while Xbox stays above 30 which causes frame pacing issues which can probably be fixed with a 30FPS lock.
On Ps4 the devs needed to optimise to get the framerate up to 30. Maybe they'll reduce AF on Ps4 to XB1 level in order to achieve that.
I think that counts:
https://www.youtube.com/watch?v=ZyefdMlnriE
Framerate runs unlocked here, but they give you the option to lock it to 30FPS.
Look at all the stuff going on here(Second Son):
https://www.youtube.com/watch?v=_ZQrIksmPxc
...and it really only drops below 30 during the orbital drop.
And First Light runs even better than that.
Infamous might not have a terribly interactive or huge open world. But its a mighty good looking one with lots of destruction, physics and particle effects. Also one of the best image qualities we've seen on consoles. Also keep in mind that you can traverse extremely fast in Infamous and there is no problem with pop in of any kind.
Of course all open worlds are different, but I think we shouldn't just accept framerate issues because a game is open world. Infamous is good example for a good framerate in open world games on console.
I hope Witcher 3 get notable framerate improvements with patches, just like AssassinsCreed and GTA V.