PS4 owner.
Aside from games, it's my go-to streaming device. The only thing I don't use it for is HBOGO. Oh, there's an app, and it's supposed to be terrific, but my cable company is Comcast, and they refuse to authentic my HBO subscription via PS4. Even though they'll happily confirm it with the iOS app & browser. Thanks Comcast! Sony is supposedly working out the deal. I can only imagine it involves a hefty payment in blood.
Sort-of games-related: I really like the Playstation Plus service. Automated cloud storage of saves, a steady drip of free titles each month, which on the PS4 means some great indie ports like Binding of Issac, Transistor, Never Alone.
Apparently the PS4 has a slew of sharing/social media-oriented features. I'm an olds, so don't use them & probably never will.