Honestly I think people put too much stock into Halo and I think people are setting themselves up for disappointment like with TiTanFall. Nintendo has casuals and young kids under wraps. Sure they aren't doing as well as they did with the Wii but the possibility is still there, especially with amiibos being released. If you don't think kids won't be nuts for those then you don't know kids.
My point. Xb1 could very well be a competitor. At this point tho you might as well be asking which is a better competitor with PC. As it stands now Ps4 is in it's own league and the only real battle now is between WiiU and Xb1 and if Xb1 gets complacent and doesn't step up in a big way, they will lose. Halo is not enough. Not even close. I have no doubt that they will step it up tho, but then I also think Nintendo will step it up too.
http://www.youtube.com/v/AoOOpLpcF28 http://www.youtube.com/v/CphFZGH5030
All Hail the Jester King. The King is back, and I am still a dirty girl prof ;)
