Canon do you hear me? Just copy Sony!
*cough* patents *cough*
Maybe it's me, but I see a lot more people around the place with 550Ds than 600Ds, maybe it's because they bought earlier or maybe it's because they just didn't see the point in the extra cash for the flipscreen.
I'd be interested to see the sales figures between those two, because if the 650D has the same sensor as the other 4 already, then it's going to have to have *something* special to make sales (sorry, but just having "Digic 5" doesn't mean squat to most consumers who buy into this range, unless it makes vastly better IQ).
I am not sure if Canon would have put any "new" tech into the G1X that wasn't available in its DSLRs. The G1X is a niche camera, and most people are not buying it for video abilities..I would probably say video is far more important for DSLR sales nowadays and that is going to be the primary differentiation between cameras..Still image quality for any camera using an APS-C sensor is going to be nearly equivalent regardless of manufacturer, especially if you shoot raw.