I am not here to try to sell you on the PS4, but I would say that PlayStation 3 and 4 are fantastic systems for indie gamers, especially in tandem with a PC&Steam. I would say the majority of my gaming is split between indie titles obtained through Steam or Humble Bundle and PlayStation games of some sort. What is wonderful about PlayStation and PS+ is the number of indie titles Sony gives away each month.In past we have received games like Nova-111, Broken Age, Super Meat Boy, Grow Home, Limbo, Stealth and Stealth 2, Guacamele, Transistor, The Swapper, The Binding of Isaac, Spelunky and more. There are also plenty of unique titles available for PlayStation like The Unifinished Swan, Hohokum, Doki Doki Universe and Journey that are all well worth playing. Obviously it depends on the type of game in which you are interested. You can see the kind of games Sony has grantes PS+ members in past here: list of Instant Game Collection titles.
For a casual gamer who plays indie titles PlayStation is surprisingly (or not surprisingly) a fantastic platform.
Yikes, that did sound like a sales pitch. However, it comes from a place of genuine appreciation for the access to indie titles that Sony seems invested in. I tend to get a lot of mileage just playing games on my PlayStation 3 and 4 because of these titles, with zero regrets. I have been exposed to wonderful games I otherwise may have missed.