On Friday I landed into Epiphany master the first iteration of a new feature that us the Igalia webkit hackers and the GNOME design team have been collaborating on for a while. We codename this feature the overview but, in its first iteration, you can think more of it as a speed dial for new pages, that will allow you to quickly jump to the pages you frequent more often when opening a new tab or window.
This will certainly be the most prominent new feature of Epiphany in GNOME 3.6, and we believe you'll love it. Personally, I think that this is a huge usability improvement, but I'm much more excited about the possibilities this brings from here on. For 3.8, our plans are more ambitious, but I guess that we will talk more about it when the time is due.