Not only are up and coming bands feeling the pinch at the pump when it's time to fill up the van and hit the road--even established acts like Greg Dulli and Mark Lanegan aka The Gutter Twins, are said to have, um, curbed their touring this season because of it--but concertgoers are being more selective about what concerts they drive to, as well. And in non-public transportation-heavy cities unlike our own--NYC--this is a big deal.
So, while music sales had been declining steadily the last few years, the concert business was doing well. But if CDs stop selling and people stop going to shows, well...