what happens next?
More games come out.
Like Ratchet and Clank, Persona 5, The Last Guardian, Horizon, GT Sport, No Man's Sky, Star Ocean, Nier:AutoMata and the wealth of third party games.
UC4 is going to be played for months by me. SP DLC, MP, Coop and replays of the SP.
SFV is a fighter. That replay value is forever.
That's not even counting the vast amount of JRPGS coming out

.
Edit: OH I see what this is.
Yeah nothing else after those two. PS4 will stop with stability updates and Sony won't even have a E3 conference next year. They'll do a Sony Treehouse roundtable with live demos of indie games played by Kazuo Hirai's son.