The correlation mentioned in this article is interesting. Yes, statistically some 30% or so of us in the world have tinnitus of one form or another, but it's not really life threatening and its annoyance is such that it often doesn't get studied. The idea that tinnitus has anything in association, much less potentially things in common, with other lasting conditions like chronic pain, chronic anxiety, and depression, that certainly lends hope that maybe it will get studied a bit more and possibly more likely someone might cure it someday.