I'll still say this wasn't quite what I had in mind, but it may well be good enough in terms of tabs management (there's still the content presentation, but that's another story).
I've been watching the vids, and they're really helpful.
I've given this tool mention on my subreddit (comment so far, story likely to follow) and on G+. After tabbed browsing and competing with vimperator, probably the biggest revolution in browsing I've encountered in 17+ years.