Quote: I just hope the new senser is square. Never could figure out why a completely new medium (digital) has to be shaped like film was?! Film format shapes were/are just optimized to get the most out of diffrent film sizes.
But square is the Best! Don't have to turn the camera on it's side (and all the nonsense that goes with that) just to shoot a portrait!
There are/have been square format film cameras. I think rectangular format film is used more because people like rectangular form factor images more than square, not because of the difference in effective film usage rate.
It's not just a larger sensor that one needs to build a square format DSLR camera. The mirror, penta(prism|mirror) and viewfinder have to be larger as well. For me, the increase in camera size and weight alone would make that design unattractive.
Plus, you need a more expensive actuating mechanism to move that (higher mass) mirror at an acceptable speed. And if you use the entire square image, you need higher processing power to get the data off the sensor, processed and saved.
In my view, the size, weight and power requirements are a very poor tradoff to rotating the camera when I want portrait orientation.