Actually I think it's pretty vapid, musically. The technique is fairly hackneyed and what he was playing was not at all impressive. As I said, vapid. But then, he is
playing on the street, not to put down people who, well, play on the street.
Actually, when you cross a piano with a guitar, you get the Chapman Stick, a quite useless instrument that has yet to find its way into any meaningful musical application.
Novelty, in other words, does not good music make.: