Long Tail Utilization

I know I am repeating myself, but it seems to me the ILL is the best way for libraries to effectively utilize the Long Tail. Since libraries are still for the most part brick and mortar, shelf space is limited, but ILL serves to dramatically expand the reach of our collections. I think beyond this, it depends on what kinds of technologies that vendors begin using as to how further to exploit the long tail. If library DVD and audio book vendors begin providing something akin to video/audio on demand for library users, accessible through a library website with a valid library card, at a cost comparable or cheaper than libraries buying dvds direct, then we might be onto something. It seems to be that while the technology is there, the business model for providing that kind of service to libraries is not in place yet. Surely if libraries can by licenses to subscription databases, a similar service for video and audio can't be far off. A vendor such as The Teaching Company, which produces educational videos, offers audio downloads on their websites. As this practice becomes more common, they will produce less physical dvds, save the cost involved with that production, be able to record more lectures for less money, and be able to pass on those savings to libraries and make it cost effective for libraries to provide a Netflix type access to The Teaching Company catalog. Seems to me a certain future trend, how soon depends on the economics.