I think the whole XBO vs WiiU has been more of an argument about satisfaction of who was right. I think to most people it was obvious XBO was going to pass at some point but some people, and while not a large group, but still some people argue that WiiU will remain ahead all generation. So now those threads have become,"see i was right, you were wrong" type thing.
PS vs XB has basically become the US power struggle of, can the xbox make a comeback. Because i think we all pretty much know PS owns Europe regardless of what happens. While Xbox can improve there it is highly doubtful it would ever lead there.