There are advantages a console has over PC for gaming.
What are these advantages? I know for the argument of simple playing, but with modern PCs and Steam and the like gaming on PC is easy as never before.
1 - Physical Releases & Used Games, these are practically non-existant on PC (though this could change on console in the coming decade.) This is especially invaluable in regions with poor internet infrastructure or data-caps.
2 - On PC you're basically forced to use Keyboard + Mouse in the vast majority of games for online multiplayer or suffer a massive disadvantage.
3 - Price/Performance, try building a PC as powerful as a PS4 for £200, Hell Sainsbury's were selling used XBO's for £130 the other day. Bluray Drive + HDD + Input Device (gamepad) + Case + PSU + CPU + GPU + Ram + necessary cables and a crappy headset in some cases.
4 - Gamepad Usability, this can likely be made better on PC with certain applications, but navigating through Windows 10 on your gamepad while lounging on the couch? Good luck.
5 - Centralized System, Windows is an open system, which does have many advantages over a closed system, however there's also many advantages to having a closed system. Everything is in one place, everything is official. You don't have to download Origin, Steam, Uplay, or any third party applicatoins. You don't have to go googling for this or for that application/software/tool, everything available on PlayStation is on the Store, it's simple. You pay a price for the simplicity in the extent of it's functionality but for most that price is worth paying. PS4 - One Friends List, One Library, One OS, One System, One Store.
6 - Idiot Proof. Unlike PC's you don't need to check system requirements, you don't have to edit graphics options to get the game to run how you want it to, and the system itself is a lot easier to navigate.
7 - Trophies/Achievements, this is a big deal for some (Ka-pi!) and steam achievements are bloody awful, as they have no seperate value and no standardisation between games. I.E This game has 5 steam achievements, this game has 800. Each steam achievement is worth... 1 achievement.