Sony has been very strong with exclusive content lately. This year the most compelling thing Xbox360 has going for it, is a new Gears game... with only about 3 total exclusives. Sony has The Last of Us, Ni no Kuni, Beyond Two Souls, God of War: Ascension, and a list of about 9 other games.... It's not a very close contest lately.
So... unless the PS4 costs an absurd amount of money, I'll be pretty interested in buying one.