This is actually two requests, but since they both are related to the address bar, I'll file both of the here.

1.
While typing an address, I would like to edit parts of an address that I previously visited. For example:

+ I had visited <http://en.wikipedia.org/wiki/GNOME>.
+ I would like to visit the entry for Epiphany, so I need to type:
  <http://en.wikipedia.org/wiki/Epiphany>.
+ So, while typing the address, the address bar shows:

  http://en.wikipe|
  http://en.wikipedia.org/wiki/GNOME
  ...

+ I would like to press the "down" key, which would "set" the address to <http://en.wikipedia.org/wiki/GNOME> (but does not visit the page yet).
  - If I press enter now, I go to the page for GNOME.
  - If press backspace a few times to remove GNOME and type in Epiphany I can visit the page for Epiphany.


2.
While typing an address, I would like to see the "title" of the webpage.

+ I had visited GNOME bugzilla, and would like to visit the bug report I had visited before.
+ While typing the address for GNOME bugzilla, the address bar shows:

  http://bugzilla.gn|
  http://bugzilla.gnome.org/show_bug.cgi?id=318728
  http://bugzilla.gnome.org/show_bug.cgi?id=321970
  ...

+ Since this information is not very friendly, I would like to see something like:

  http://bugzilla.gn|
  http://bugzilla.gnome.org/show_bug.cgi?id=318728  On password prompt, address
  http://bugzilla.gnome.org/show_bug.cgi?id=321970  Drop-down list/combo box at
  ...
                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^
                                                    Title of the webpage

Konqueror sets the title part to italics, making things a bit easier to read.