The Xbox One has fourth quarter on lock. Sony fans will never admit it though.
Sony will win Europe and Japan easily, like always, and will win worldwide.
Even if you're only talking about US (it's still funny when people do that ^^), you can't tell anything without knowing the bundles and prices. Don't underestimate the Star Wars, Assassin's Creed and Call of Duty PS4 bundles. They will sell a lot. Last year, the One won thanks to the cheap CoD bundle (at least in part). This year, it's on the other side...
OT : No console for me this year, only games for my PS4 and Vita. I may buy a Wii U someday, or upgrade my computer, we'll see.