Like I said before time and time again and it's something MS is completely quiet over and a lot of people on here don't realise. MS may reach parity at times with resolution at 1080p or the same on both platforms.
HOWEVER what they fail to mention on purpose and keep quiet about is all the other differences. More framerate drops (Sniper 3, Watch Dogs), more tearing, 30fps frame rates vs 60fps (tomb raider), complete lighting features missing (watch dogs).
Games may run at 1080p on xbone but it comes at a cost in performance in other areas. MS has spinned the whole resolution debate in a way where it makes people think that's the only difference. The Xbone can't have both tea and cake as the hardware isn't as powerful . Sure it can run games at 1080p but then you get performance and/or complete graphical effects missing