PS4 still has it over Xb one on price, and to a lot of consumers price matters, a lot. And with Bundles like PS4+KZ:SF+PSEye+2nd DS4 at the same price as the base Xb one the perceived value of PS4 out of the box is too high for Xb one to realistically turn the tables on PS4. With the game library and no longer having anti-consumer policies Xb one can close the gap a bit.
“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