Okay - a litle update. It's been ~1.5 years.
Here is a very early demo of running a p2p-news-app in a web browser.
It leverages hyperswarm-dht-relay in a similar fashion to nostr relays.
Hopefully this will soon be a lot more mature :-)
https://youtu.be/79pv95Yk8qE?si=SAP9zo-o3bS4xhQX&t=493
I know it does not yet look like the wireframes you originally shared.