Well, I agree that it's just a fancy little feature not necessary, so no of course there is no need : ) But so is the ability to adjust volume by scrolling over the whole control bar, not necessary, but quite good in term of UX.
Just seems cool and convenient, is all. Of course, not necessary at all, don't worry I won't annoy anyone with that. It seems that this wishlist board is the place for asking this, I'm pretty sure Steven is totally able to ignore the suggestion ^^