On 28 october the big update will appear on ps4 with custom themes and usb music player. and with -oh-my-god- SHARE PLAY feature.
"Share Play" means: You can invite a friend to the game and he can play it without owning the game. And even more so is possible. But now to the question: Is it the best feature ever? What are you saying? Its a amazing feature, i think. I wish you a nice day. more info? here
http://www.youtube.com/watch?v=ocJeVjGIFfY
http://www.youtube.com/watch?v=LSBH88B1u_g