You are confusing framerate with monitor update frequency.
no no no
That was why I talked fps vs monitor updates (refresh rate)
A 60 fps framerate is way more than what is used in Hollywood movies (20-something i believe?), and way way more than what is used in e.g. anime movies (12fps I think).
Yes, TV's are 24 fps - however unlike Cameras, computers cannot (or rather do not) use motion blur, which is what makes 24 fps acceptable.
So yes, 60fps is quite enough.
As you also know, any game doing 24 fps will look awfully jerky - and many will also say that they can feel a difference between 60 and 100 fps - I for one can.
But this is mostly related to FPS games. Many games can get off with much lower framerates - puzzle/rpg/rts games often do much lower framerates - some even 30 fps.