I don't agree with your point at all. I believe the vendors are fundamentally to blame for the situation with the web today .. the walled garden was intentionally created to protect the bigger consumers.

And none of the issues you state as being the reason why we can't have nice things, are actually valid reasons. OS Vendors could solve the problem of serving content from ones own local PC's quite effectively - the issue is not the technology, but rather the ethics of the industry, which prefers to have massive fields of consumers to farm from..