Any game that is not an entry to a known franchise, or that is not a FPS-TPS-W.RPG is an indie...Haven't you gotten the memo?
Sony is playing it smart, imo. Why would I send my games to die when year's end is crammed with huge 3rd party titles that have always proven enough to carry a console?
Yep why release big games when you will likely have COD, Battlefront, Assassins Creed, MGSV, Mad Max, maybe even Fallout 4 as competition. I think they are making the right choice to release a kids game like Ratchet and a niche game like Persona 5 for fall as those games are for a different audience. Then they can release big hitters in the dry spells with games like Uncharted 4 and Street Fighter V where the games can get all the attention. It worked with The Last of Us and BloodBorne.