Been [re]playing Wind Waker HD recently and the game is 30fps. And at times, with how smooth it was, I don't know if they have some tech that interpolates frames or something, but it felt really smooth.
When done right (no fluctuation, motion blur, etc...) 30fpos feels quite smooth enough. The main objective for any game should be to make sure the frame rate is rock solid. And Naughty Dog usually manages that.







