Jean-michel Bonnemoy claims that traditional cameras were designed to hold a roll of film thus the standard rectangular style is not optimal for performance. Bonnemoy created a concept camera, the D-Can, to show how cameras should be shaped more like a cylinder. His design supports larger range zoom, faster focus correction, extended macrophotography, and overall higher quality digital photos.
The lens cap for this concept camera also houses an electronic flash and is fixed to the camera making it impossible to lose. There will be a viewfinder with a magnify eyepiece that can be flipped up. Standard I/O ports will include: microphone, audio headset, and power supply.
This concept makes sense since camcorders are designed much the way. However, I find it to be more difficult to steady the camera with one hand vs using both hands. There's tons of stabilization technology in most cameras these days and I think the D-Can will need to have really advanced anti-shake hardware. All in all, it's a neat concept and there is probably a market for this type of camera.