DF: Housemarque interview reveals new details on 3D for PS3

[theprof00]

Slimebeast said:
Why is they all nneed 120hz? Why doesnt 60 frames per second is enough? I mean thats 30 frames for each eye, 30fps is enuff in most games.

technically the eye can see more than 80fps, it's just that 30fps is just about the slowest  it can be before we start to notice speed problems.