Brief Summary
In Safari, when you hit Command-Up (⌘↑) or Command-Down (⌘↓) from the address bar, it moves the selected item to the first item in the section that's being navigated towards (i.e. which direction). I think Orion should mimic this feature, since it makes paginating through sections easier.
Details:
Currently, when displaying results in the address bar, Orion groups them by their context. For example, a query may have a "Top Hits", "Suggestions", and "History" section. However, there seems to be no shortcut for moving between sections, which can make selecting a result take longer. As said in the brief summary, Safari supports this feature, so the general idea for how it would work is there (demo in the video).
Image/Video: