I like your point that people will have the opportunity to choose which pieces of the problem they want to own.I think that is very true and not everyone will feel comfortable going to solo route.
I didn't get your 5th point the first time. You are saying "A publisher by any other name is still the person or technology that makes a work available" O'Reilly itself may be in danger of someday becoming irrelevant, but publishing itself will still exist.
I agree with that. What I find sad is that many of the existing industries are using legal manuevering to extend their existance beyond it's useful life.
The Mickey Mouse Copyright Extension
Microsoft's Software Choice
The RIAA and it's DMCA stuff