Buy PS4 if you want diversity in Exclusives games with New IP's from Sony first party studios, better console experience, many unique features, better multi platform games and want great value.
Following are the benefits with PS4:
Japan - Bloodborne, The Last Guardian and many new IP's
Naughty Dog - Uncharted, Last of US and New IP
Guerilla Games - Killzone, new RPG IP
Media Molecules - LittleBigPlanet 3(coordinated), next gen Play.create.share new IP
Sony Bend - rumored new IP (Horror)
Evolution - DriveClub (socially connected semi arcade realistic racer)
Polyphony - Next gen Gran Tourismo Simulator
Quantic dreams - new Emotional IP
Ready At Dawn - Order 1886
Sony xDev - Shadow beast, Everybody gone to rapture, Rime, Hohokum etc., many new experiences
Many unannounced exclusives from Other Sony Studios
Project Morpheus Virtual Reality Feature
PS+ - Discounts and Free 2 games every month with great value
PS Now Streaming for backward compatibility with some games
Powerful Console, good feature rich controller and affordable price
Better multi platform games than other consoles
Indies, F2P support more than other consoles
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.