I've ended up saying this in quite a few threads, so I'm creating this thread to discuss the main reason digital distribution will not be implemented next gen.
Retailers would not like it. This is the reason.
Elaborating further, we can assume that by the end of their life a console will have an attach rate of 10. This represents perhaps $100 - $150 (figure pulled out of thin air. Does anyone actually know how much the retailer makes per game?) in profits for the retailer. Add in that they deal in used games, and probably make somewhat closer to $200 profit on games for each console.
Note that I am making the assumption that a person buys all their games from the place where they buy the console. For large numbers of people this approximation is valid.
Therefore, retailers will only sell a digital distribution only console for $200 more than they otherwise would have.
And there are perhaps other considerations, about which we usually do not consider. It is quite possible that Sony and MS have a special deal with shipping companies where they get a special price on shipping consoles but pay extra to ship games. This would no longer be possible, and thus prices would increase more.
The only way we can get to digital distribution is by all the console makers making the transition over a number of generations. Wiiware/PSN/XBLA will become more important over the generations and slowly it'll become more possible to kill of retail games
Thoughts?