Ben's spatial limitations are twofold. First, resolution comes only as quickly as he can click and process. Second, he's got limited range.
But what if he had something like a radar or ultrasound transmitter, and something to translate the returns into sounds that could be played through stereo earphones? Not so loud that other stuff is drowned out, but enough to give a sense of magnitude and direction....
Maybe this guy has pointed out a potential application for those not so gifted as he....
But he is doing all these things at his age, without a stick or a guide dog. I don't think its just that he has exceptional hearing.
I think his limits are only going to be right now what's society is placing on him and more critically, safety considerations.