Originally Posted by UK_Scotty
Never going to happen. Canon won't change sensor size on the crop-body cameras any time soon. They're not going to orphan the EF-S lenses and the cash inflow those generate. That's the entry-level to semi-pro market, and they've invested a lot of time and effort into convincing the public this is going to remain viable for a long time. Dumping the platform now would revisit the FD rancor of years past. The 5D II is too popular, and the Mark Is are commanding a comparable price to the 50D on the secondary market. I suspect Canon's happy with that.
I could see Canon expanding the 1.3x with a line of mid-pro cameras, but in all honesty, I suspect that chip is an evolutionary dead end. I'd expect Canon to develop a "new" 1.6 APS-C chip that's able to sidestep some of the current limitations while retaining the current size. Remember, Canon was criticized for cramming too many megapixels onto the D60 chip way back when, and they've long since worked around those issues.