Thought Micro Four Thirds would be the only technological innovation for digital interchangeable lens cameras? Not anymore. There's a leak about Ricoh's upcoming modular digital camera where the whole lens-cum-sensor is interchangeable. In the following video, the dude changed from a 24-70mm lens with a 10 megapixels CCD sensor capable of only recording VGA video to a 50mm macro lens with 12.3 megapixels CMOS sensor that could record in HD! Another advantage will be dust free despite many change overs. Rumours of rumours say that Ricoh also plan to attach a printer and/or a projector so that the body itself could print and/or project without any lens and sensor.
And if you think it's expensive, you are right! The camera body retails for US$703, while the macro and zoom lens + sensors cost US$1,004 and US$502, respectively. Innovation sometimes come at a price... in the beginning, at least.