Tbh, i easily understand PS4 sales in Japan. The thing I don't understand - is why it sold so good in the West. Thats a real puzzle for me.
Because Sony was loud and clear about Gaming, have powerful console, sleek design, better controller, connected features, new technogly(project morpheos), backward compatibligy in someway(Playstation now), PS+ with more value to gamers and they are pumping more exclusives (based on PS3 and they had Last of US before PS4 which provided huge boost to Sony to trust them).
GAMING is not about spending hours to pass/waste our time just for fun,
its a Feeling/Experience about a VIRTUAL WORLD we can never be in real, and realizing some of our dreams (also creating new ones).
So, Feel Emotions, Experience Adventure/Action, Challenge Game, Solve puzzles and Have fun.
PlayStation is about all-round "New experiences" using new IP's to provide great diversity for everyone.
Xbox is always about Online and Shooting.
Nintendo is always about Fun games and milking IP's.