Microsoft are still refusing to deny that it requires permanent internet connectivity. It also locks out second hand games via online DRM. It also lacks the hardware edge for gaming, as they seem to have aimed for an all-singing, all-dancing entertainment platform.
Sony, OTOH, have announced that PS4 doesn't require online and you can play pre-owned games on it.
At this point in time, I'm afraid, the PS4 wins.
I'm quite interested in this, as I'm planning on getting my son a next-gen console for his birthday.