Yep, that's it. The only thing people want out of PSN they don't already have is party chat. With Skype integration, you not only have the ability to chat with people playing different games in a big lobby, but as an added bonus you can even talk to people on their PC or phones. NOT ONLY THAT but Sony won't even have to run the servers themselves! So it's cost effective for them and the users.
So now PSN is free and has every feature that XBL has and even better. PS4 online wins.
Where do I get my money?