Continuing the discussion from How do we feel about the checkboxes on the right?:
Although this function works on iOS, I think it would be an absolute disaster if brought to OS X.
OS X already has a significant amount of one finger (panning), two finger (scrolling), three finger (moving between ‘spaces’/full-screen windows), four finger swipe (Mission control) gestures.
How would it work within an app? It wouldn’t.