Essentially, Canon started the dslr bubble with the 300D and now it's beginning to burst.
This doesn't mean they going to disappear, it just means the big dslr manufacturers might have to drop back down to 3 or 4 product lines instead of 5 or 6 to remain agile. The market that they had in, say, 2005 is still there and it should be more than enough to support them.
Social photographers can come and ago but there'll always be a lot of people who put quality/usability over connectivity/portability and it's this market which will sustain the companies who make the best/most usable products.


, so there is going to be a lot more interest in the 5D IIIs and 70-200 2.8s than in Rebel bodies and EF-S lenses.
