I don't see how Site.js is any different than what he describes as "big web". So you create your own website and host it on a server. That's always been possible. What am I missing?
This image could have some smarts to either punch the right holes through the the router's firewall or do something even more clever with a peer-to-peer mesh network.
At the end of the day, what one would have is a website of their own that they control within their residence. It would foster a lot of this small web spirit and be very cheap to bring to market and maintain.
If anything, the "dumb delivery mechanism" only became slightly more trustworthy?