There has been quite a few articles about the Sony RX1, but I think this PhotoPlus 2012 video has some of the best insight about Sony's Full Frame compact camera, and why they couldn't make it an Interchangeable Lens Camera. The lens is actually recessed into the camera body, and the shutter is fit into the lens. There is some additional information in the video such as a comment about uncompressed HDMI output for external recorders. The new Sony RX1 should begin shipping in about a week and can be found for $2800 dollars via B&H (click here).
Sony RX1 Full Frame Compact Camera