As I have stated many times, the internet backbone is stretched quite thin these days, even if the leaf nodes of the internet have much greater access to it.
Check out this link, about Comcast's plan to implement a 250GB/month bandwidth restriction across the board, starting Oct. 1:
http://blogs.zdnet.com/BTL/?p=9837
You can expect other limitations to follow over the years. I'm going to stick my neck out and say that, eventually, you'll be paying long distance charges for internet usage, just like you do with the telephone system.
100% Digital Distribution has a lot of hurdles to overcome, and some of them may be insurmountable, from a financial perspective, until it becomes prohibitively expensive to manufacture and physically transport media (i.e. oil crisis).
