Yeah, since the music isn't happening, why not? Jon's image has depended a lot on his hair. For 30 years he has been asked about it, not so much this tour, but I recall lots of comments/questions from interviewers as recently as the Circle tour. He no longer can do the shaggy, long-haired, casual look so what is his hair future? I bet he gets nervous when he looks at musicians such as Sting, Phil Collins even Bruce Springsteen.

Here is a refresher on the JBJ hair years:
http://www.people.com/people/videos/0,,20469120,00.html