Slightly better graphics 100% of the time vs slightly better fps 0.1% of the time. Decisions, decisions.
Or to look at it another way:
PS4 can't achieve a locked 30fps at 1920x1080p, that's a shame. But Xb one can't even manage it at 1440x1080p, that's shameful. Xb one is rendering 25% fewer pixels per frame and still can't manage a locked 30fps. And in terms of pixel count 1440x1080 is a lower output than 900p (900p is only 17% fewer pixels than full 1080p).
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix