Look at BO3 for ps4 just because it is going to have map packs one month in advance. I didn't understand how this was important last gen and won't pretend I would understand it now but apparently one month of exclusive content can make a difference between COD fans.
I even met someone at twitch last week that had an xbox one and bought a ps4 just because sony got the COD marketing rights and even bought dying light for ps4 when he already had it on xbox one. I simply don't understand some gamers. If you had an xbox one, there is no point in buying a ps4 to play the game that your console already have.