Conductor's Theremin

I've never understood exactly what's so special about conducting an orchestra, besides keeping up with two-dozen simultaneous lines of music at once. How do you tell a great conductor, besides one that knows the music, the correct tempo at a given time, and his orchestra? I dunno. My theory is that the best conductors usually throw as much melodrama into their work as they can, so to encourage the orchestra to emphasize the musicality of the piece being played; all kinds of facial expressions, lifting heavy invisible objects in heavy moments, wildly waving their hands during grandiose brass themes, and tossing their head around as much as possible, so that most are sweating profusely by the end. (Memories of Bugs Bunny conducting 'the Barber of Seville' spring to mind).

But what actual note is to come of all of that effort from the conductor himself? Nothing but the allegro tempo of his thumping heart. Instant instrument jealousy. I propose that we swap his conducting baton with a theremin stick, and let him wave away inside the active zone of a theremin, built into the conductor stand. Let's hear the results of all of the melodrama...