A search funnel would be an interesting thing (does this exist?) whereby you whitelist "only give me results from these resources" - and where 'resources' can include the whitelists of others that you trust or have subscribed to.
Basically you could have a search engine that only replies with information from whom are also of the same interest as you - or people you congenially follow etc...
So you could say " show me everything about X" and the results are only from those who are actually connected to X in some way - based on the interest subscription graph as opposed to a keyword graph...
I may be a moron on this subject - but I do recog that there is room for improvement...
I added the following to a previous comment:
*"A cool way of implementing this would be instead of CTRL+SHIFT+N would be CTRL+SHIFT+N[1-9] to shift to VIEW and would take me to that tab-stack... and there would be a page that would allow me to manage each tab-stack around [TOPIC] - Meta Book marks..."*
I mean, you can search only those sites with Google.
Just add:
(site:stackoverflow.com OR site:superuser.com OR site:serverfault.com OR site:stackexchange.com OR site:twitter.com OR site:flickr.com OR site:reddit.com)
You could make your browser do that automatically.
Google results are currently awful, full of blogspam and Pinterest-mirrored images. I don't remember when this changed.