Some Sony designers have come up with five prototypes showing alternatives to the standard keyboard/mouse computer interface.

I find the Gummi-Bend concept particularly compelling.  With commercially viable flexible electronic "paper" right around the corner, Gummi shows how this technology could be used to help people get more out of maps.  Having recently spent four days tromping around Manhattan with only one, fixed-scale map in my pocket, Gummi would have been very useful.  It looks like a lot of fun to use, too.  And when it comes to designing interfaces, pleasure matters.