Will something better emerge on the platform at some point down the line? Probably. But, for the time being, Don't Starve: Console Edition is easily the best indie PS4 title available for purchase on PSN.
If you've already played the game on the Nintendo 3DS, it's unlikely that you'll find anything in the game's PC port that would justify a second purchase of the game. Unless you're feeling particularly supportive of Image & Form, and/or you despised a particularly aspect of the game's user interface on the 3DS, save your cash and play your existing copy of SteamWorld Dig.
Longtime fans might lament some changes but the series' soul remains intact. If you have ever been curious about Monster Hunter, or bounced off a previous iteration, there's never been a better time to pick up a sword.
Everything about Diablo 3: Reaper of Souls leaves me wanting to more, despite the fact that I've already cleared the campaign on multiple occasions, and I wouldn't be shocked if I've got a full roster of level 70 characters by the time the year comes to a close. It's been a long time since I enjoyed a hack-and-slash title as much as I'm enjoying Diablo 3: Reaper of Souls, and I plan to milk that for all it's worth. I suggest you do the same.
There are already too many titles vying for gamers' attention, and it's only March, but I'd make damn sure NieR: Automata isn't one of the games you miss this year.
It might only be April but we wouldn't hesitate to say Dark Souls 3 is going to be one of 2016's top releases.