bohdank wrote in post #9475753
Canon said they couldn't fit the focusing system of the 40D/50D into the space of the 5D... so I would imagine the 7D's would also not "fit", unless the design of the 7D's is more compact or they make the 5D bigger. I doubt the latter will happen.
They also said there was no hue and cry for better AF going from the 5D to the 5D2, so they figured the 5D AF system was sufficient. I find both statements suspect, personally. I mean, come on. The AF sensor isn't that big. However much bigger the 40D/50D AF sensor is than the 5D's, even if fitting it in would require a body redesign it's not like the 5D2 would've been massive with it in. Both statements sound like weak justifications for a design decision that most everybody outside of Canon have a hard time accepting.
At this point in the game I've given up hoping that Canon will do this or that. It'd be really nice to see a 5D3/3D/whatever that features a 5D2-ish feature set (FF, low-to-medium frame rate, etc.) with 7D-level AF, but I no longer set myself up for disappointment by applying common sense to Canon's paranoid product segmentation.