I'd say that in order to get rid of cabled headphones at some point in time, you have to start somewhere. I do think that wirless headphones is the future and that headphones with a cable will cease to exist in a few years. I can't argue that there are financial decisions involved into it and that they are not making a killing with it. But someone needs to start somewhere.
I think this apply to any technological advance we've made so far as humans and its part of evolving.