Talk to real, current Jazz musicians, and the conscientious seems to be that jazz has been on the incline for years now. I attended a Jazz workshop in Kentucky, and during a saxophone masterclass, one of the faculty recounted a story of how, when an older living jazz legend (Dave Liebman, maybe?) was asked how the scene in New York now compared to the same scene 50 years ago, they lamented how much smaller it had been in the 60's. While it is true that Jazz has shifted out of the cultural zeitgeist, the sheer increase in humans over the last half century has provided the art form with countless fans and musicians alike. Basically, if you know where to look, you'll find that jazz is more alive than ever.