Ricoh has launched the GXR which they call an ‘interchangeable unit camera system’, so basically it is a modular camera system with a bunch of interchangeable parts.
The Ricoh GXR features interchangeable lenses which slide into the body of the camera, this is designed to keep the body of the camera small, and the interchangeable units change the cameras megapixels.
For example one unity features a 24-72mm lens with a 10 megapixel sensor whilst another unit features a 5mm lens with a 12 megapixel sensor.
It certainly does sound like an interesting idea, and one benefit that the Ricoh GXR has over DSLR cameras is that the lenses are all sealed units, which means there is no chance of getting dust in the lens.
The Ricoh GXR features a 3 inch LCD display, you can also purchase an additional electronic viewfinder unit, and when it goes on sale the camera body will unit will retail for about $700 whilst the lenses will start at about $370.