It takes $$$ to advertise, so right now MS & Sony are both sharing some of it. If Sony could afford all of it, maybe publishers would just go to them. On the other hand, both userbases are large enough that publishers want to appeal to both, so if they never show any love to one side they will be hurting themselves too.
Activision - Destiny on PS4, COD on XB1
Ubisoft - FC4 on PS4, AC:U on XB1
EA has been more on XB1's side thanks to Titanfall, Madden, EA Access...








