I watch movies at 24fps, looks fine to me.
That sidescroller 30/60 fps test only shows two things. It's more obvious on monitors, and 60fps is more important for fast sidescrollers / shmups. Rest works fine at 30. Heck I played ED: Horizons at avg 10fps for months...
I wonder why cinematic games don't do the cut scenes in 24p. Are there still tvs that don't accept that?