I know most people would not agree, but here goes.
Here is what I think would make the most awesome killer camera, which Canon will never make.
1. 5D like body with FF
2. 7D like AF, Flash control, and Exposure system
3. Make it 8.3M Pixels ( 3840x2160 (16x9) [This is essentially HDx2] )
4. Allow 1:1 (4MP=2160x2160), 3:2 (6.9MP=3240x2160), 4:3 (6.1MP=2880x2160) and 16:9
5. Of course it would have super low light abilities because of the Gianormous pixels.
6. Video with 1920x1080, 1280x720, Movie Crop 1920x1080(2x) and 1280x720 (~3.2x).
7. Give it 6fps.
Here's why I think this works. No need to explain FF. The 7D AF, Flash control, Exposure system will give most people what they need for landscapes as well as sports. Although you might complain about 4MP for square ratio, this would mostly be used by wedding photographers and its plenty for a wedding album. More and more HDTV's are in the home so 16x9 is a good format to shoot in, but you still have 4:3 and 3:2. Since the pixels are like a acre large it would do great at ISO25,600. Since it has HD Video and canon seems to excel at that, this would be a natural evolution.
Can you come up with a better killer camera, It does have to be somewhat affordable. Say less than $3000. No bubble gum machine or dishwasher like feature, OK!
---------------Using Cashoo suggestion of 3:2 format---------------
3840x2880 (4:3-11MP)
3840x2560 (3:2-9.8MP)
3840x2160 (16:9-8.3MP)
To make this happen it may have to be a 14MP sensor because of the unused area. Still sounds like a great way to go to me.
