I was thinking about various things that people fiddle with everyday that Canon could work into future bodies to make life easier. They have begun by adding the Max ISO setting to the T2i, but I feel they could do so much more...
1. Focal length / shutter speed binding. this C. Fn. would measure the current FL of the lens and set the shutter speed to match that when shooting Tv mode. another C. Fn would set the x factor, so you could shoot 1.1, 1.2, 1.3, etc x the FL of the lens you're using. this would auto-compensate for crop bodies.
2. Variable aperture / ISO speed binding. this C. Fn. would take into consideration the variable aperture nature of your lens and adjust the ISO as necessary so that, when in M, your exposure would not be affected by zooming in/out.
Both of these could be programmed to work with all lenses, or just Canon lenses, to further encourage consumers to purchase only Canon equipment, similar to the way PIC works only with Canon lenses.
Would you be interested in seeing these features in future bodies? what other features?