But that is exactly the reason that has most people on this forum up in arms, they AREN'T keeping up with advancements in new technology, they are simply rereleasing the same camera over and over again in different configurations. The average consumer may not notice or even care, but we dedicated shooters and die hard Canon fans do!
Fine. But, 'we dedicated shooters and die hard Canon fans' make up an infinitesimal fraction of their market. The vast majority of dSLR buyers are 'average consumers'.
Now imagine what would happen if we "infinitesimal fraction of the market" stopped supporting Canon. Marketshare is directly related to mindshare. It doesn't matter what the actual facts are, only what people perceive are the facts (Marketing 101). Ask Apple about the Final Cut Pro X fiasco. When enough pros (who equally represented a small portion of Apple's market share) bashed the new editing software, everyone else abandoned it as well as they assumed the pros must know what they are talking about. Canon like any other company need professionals to shoot great images with their gear to market the possibilities to non-professionals. If enough pros start complaining, even those not knowledgable about it will start to echo those complaints creating a snowball affect.
How long ago did you take Marketing 101, and how well did you do in the class?
I understand what you're saying, but you fail to understand they're NOT releasing the same camera
over and over, they're reusing a good sensor in the same way automakers use the same already fuel-efficient and sufficiently powerful engine for multiple model years and across trim levels.
Let's take your analogy - did the Final Cut Pro X fiasco affect sales of iPods and iPhones? No. This 'sensor stagnation' is something for forum posters to bitch about, but it won't affect people picking up a Rebel from the shelf at Best Buy. Also, every time someone tunes their TV to a major sporting event, they'll see lots of pros with Canon white lenses (even if none of them bought them personally). The 5DII outsold the D700 and the 5DIII is outselling the D800...so odds are, the next wedding someone goes to, they'll see a pro using Canon. Etc.
I'm not saying Canon shouldn't improve their sensors – they should! But the idea that there will be dire consequences at the corporate level if those improvements are merely marginal is simply foolish.