Leap looks like an interesting gimmick, for now, and someday I'm sure we'll all be using an advanced form of it, but I suspect in these early stages, if given the choice of a mouse, or it, after a day's use you'd be begging to get the mouse back.
It reminds me a a gyro controlled remote that came with a Sony recevier, that was once on the market : you might show it off when visitors come over, showing how your hand/arm gestures changed the OSD GUI, but you ditch it and return to the normal remote, as soon as they leave!
In A/V reproduction accuracy, there IS no concept of "accounting for personal taste/preference". As art consumers we don't "pick" the level of bass, nor the tint/brightness of a scene's sky, any more than we pick the ending of a novel or Mona Lisa's type of smile. "High fidelity" means "high truthfulness", faithful to the original artist's intent: an unmodified, neutral, accurate copy of the original master, ideally being exact and with no discernable alterations, aka "transparency".