We're just lucky that Canon still seems to be interested in maintaining its image as a professional photography company - despite the fact that most of their revenue comes from office machines and consumer grade P&S cameras.
I don't think that's entirely true. You're right that office machines are the largest chunk, but in 1Q2011, approximately 35% of Canon's revenue came from their camera division. Canon sells a lot more P&S than dSLRs, with the latter only represent around of 20% of uint sales. But units don't matter, value does - and dSLRs and lenses make up around 70% of revenues from the camera division. So, that means something on the order of 25% of Canon's sales revenue comes from their dSLR lines. Granted, the vast majority of that is the Rebel/xxxD line, but still, they have a strong incentive to maintain position as a market leader, and the cache of the pro lines is a part of that effort.
For the numbers, see Canon's 1Q2011 report.
Exactly right. I've been looking for the actual details on the figures in their financial statements but didn't quite find what I was looking for. But I'm on the same page with you, only that I counted the Rebel series as part of my broad statement about "P&S" cameras. Whatever you want to call the consumer and "pro-sumer" segment. It gets even more confusing because Canon actually puts all camera related items under "consumer".
Revenue alone is not helping us either since we'd need to know what the actual profit on the 1-series cameras is. In the big picture probably not a lot. But of course they benefit from image/cache and trickle-down technology.
So, really. It's all good in the end. They've been a leader in the pro and consumer camera market for quite a while, just survived an earthquake and the aftermath of a national catastrophe and obviously still working on bringing to market a few more big ticket items. What's the rush? The current line-up of gear obviously works well at all levels.