Well, next gen means slightly better looking games.

Go look up comparison videos of games on PS3 and on PS4 - The Last of Us, Tomb Raider, GTA5. You can tell there's a leap, but it's not really all that huge. It's like the leap from late era Xbox games like Dead or Alive 2 Ultimate to early 360 games like Dead or Alive 4. DoA2U and DoA4 look pretty damn similar, with DoA4 only being the kind of leap forward now.