In The Future, Everything Is Recorded
Jamais Cascio gives an interesting "presentation":http://www.itconversations.com/shows/detail375.html called _Participatory Panopticon_ about some of the ways in which the ability to record and archive everything will change our future. He specifically mentions something that's been a little dream of mine, a camera embedded in your glasses that can take a picture of what you see. Although in his version, the camera also records and automatically archives everything you see and can display it back to you right from the same glasses. It becomes a searchable record of everything you experience.
Interesting thought. As he mentions, all the pieces of this technology exist now or will shortly. He mentions some sort of camera that exists now that can be embeded in glasses and is constantly recording. You can hit a button at any time and it will save the last 30 seconds of what you saw. Combine this with pervasive wireless networks, GPS and facial recognition software. He mentions a Colossal Storage claims they will have a 10 petabyte drive by the end of the decade, enough to store a year's worth of uncompressed video.
The world will be a different place then. How, for instance, will photography change when you can always go back and get the "decisive moment":http://en.wikipedia.org/wiki/Henri_Cartier-Bresson#The_Decisive_Moment? Cascio theorizes a bit more on what the world is like when everyone is recording everything all the time. People will come to rely on it as their memory. People without it will be at a disadvantage. Public officials will have a harder time keeping secrets.
I agree though that the user interface for this archive of everything is a very difficult problem. The Star Trek computer has to be the Holy Grail, right? The "Minority Report":http://lukew.com/ff/entry.asp?104 one is pretty cool too though.