I dunno, you may be right. There are a lot of hurdles to it, mainly from the studios. Hell, TV networks are still fighting to the death over ads on sites like Hulu. There's also the problem of technology; even the best high speed Internet providers in America can't handle streaming or downloading a high volume of video at a decent resolution.
Even with Netflix Instant being a million times better than it used to be, I still buy physical media simply because you never know when a studio is going to pitch a fit and pull their stuff from the service.
"COLONEL KLINK, WHY HAVE YOU FORSAKEN ME?!"