There will always (for lack of a better term) be some of the population of people that want to "own" a tangible version of whatever they own.
DVD's do that. 3 years from now, it'll be HD-DVD (or some variety there-of)... 7 years from now, some form of Super-DVD's... 20 years from now, HD-LED's...
.. or whatever... point is, until we evolve beyond having hands, there will always be a market for tangible media, imho.
