The Xbox One looks like it might have something of an identity problem, wanting to rule the living room and be a hardcore gaming console at the same time. But the PlayStation 4 has no such dilemma; it's a machine for playing video games. That's really all it is. And that's totally OK.
Sure, the PS4 has some entertainment apps, like Hulu, Netflix and Crackle. And it's sure to get many more over its lifespan. It has an internet browser too, of course. But you won't be plugging your cable box into the back of the PS4, or calling out the names of Skype contacts. On PS4, you'll be playing video games.