That was the question on the front page today....Maybe I am out to lunch here but how can Canon be a threat when its using Sony's sensors, that to me shows that Canon has reached a limit to in its ability to inovate. The only threat I see is that unless Sony take up more effective advertising they will get lost in the mix because the money Canon save in development they will spend on more advertising which even now is an astronomical amount.
We have to give Sony credit for the incredable efforts and influence they have had on the SLR world, as a converted Nikon user I have regained the excitement I used to have when packing up my equipment to go on a job, there are improvements to be made of course as any critic is quick to point out but at least the are working to improve on an the most exciting system out there.