The best interface is, of course, the human brain. I can close my eyes and envision my movie playing out in my head, often before I even shoot it.
Once in the editing mode, I know I have a shot of a particular action from a particular actor from floor level, but I did not log the footage so I need to manually scan the bins to visually find the clip. What if the computer was smart enough to hear me say “find a clip of Bob throwing a pencil from table level…etc” and the computer knows which character is Bob, knows what a pencil is, and has a basic understanding of camera angles, and it presents me with my clip, or a few options.
Supposedly the government has face recognition technology, so I think the future will be computers identifying the contents of the video, so we can interact verbally, like you would with a film assistant back in the moviola days.
As for a visual interface, it should take the customizable interfaces of Premiere Pro and FCP and let you make any kind of window configuration you want, that is, make any kind of interface you want. Why conform to a standard designed by AVID, when you can create something which works the way you work.
Mouse, pen, touch screen? Every few years a new device is invented. Some are great, some are silly. The hand-computer interface will change over time. An eye-tracking screen might work.
Droidmakers was a great book. Everyone should read it!
Mike