I can't help but wonder whether there will come a time when audiences too are supplied with headsets at large gigs. How surreal would that be? Huge crowd, band silence in the arena as they jump about and sing out of tune. I wonder what the reaction would be if you told potential punters that this is how a gig would work. I'd hazard a guess that many of them would be horrified and would much rather prefer the rawness of soaking up a conventional gig at normal volume.