I think the only upgrades this year will be digic 5 and the AF and lens. Next year would get the 70d sensor.
The sensor will be the same one that's currently used in the 60D and 600D.
Maybe tweaked a little.
The 650D will still have some image quality improvements, though - coming from the Digic 5+ processor and Canon's new JPEG engine.
Maybe half a stop cleaner ISO.
In addition to the update AF, the 650D is also getting a pentaprism viewfinder.
Thus, the only difference between the 650D and the 60D is now the top LCD screen.
In other words, the 60D is basically dead. Long live the 70D