A sad day: I just bought a Canon today. If Nikon had published a roadmap with at least vague indications of what and when then maybe I could have planned ahead, had some idea of the costs of having to rent or borrow a Canon every time I need to shoot video. But it's been several years now and Nikon's policy/strategy of not saying anything has been anything but helpful.
Hello phosphoro and congrats on your new purchase. Both Canon and Nikon make very fine cameras and lenses, and wether anybody goes with either brand should be based on which products and company feel more suitable to them. Now having said that, I find it odd to base my camera purchase on wether or not a camera company makes advance announcement of their products.
First of all, let's be clear, Canon does not have roadmaps. A roadmap from Canon would be something like them saying "the 5D mkII is expected to be updated on so and so date or in so and so years/months" and giving that information for the majority of their products. Canon does not provide this kind of information nor are they likely to ever do. Here is the closest they have ever had to a roadmap (which anyone can figure out by looking at Canon's lineup):
What they do do on the other hand is make advance announcements or "in development announcements" which are not roadmaps and even then these are reserved only for their top tier products (the 500mm and 600mm above are priced at $10.5k and $13k respectively, the in development cinema DLSR is expected to have a price between $16k to $20k and the 1DX is priced at about $7k). Not even the 5D line gets this kind of treatment never mind the 7D so I'm not sure how you can argue that point. Heck, the 5D mkIII should be released soon and there are only rumors.
On to my second point, I think we all know with a high degree of certainty that Nikon will not abandon their D700 line and that an update will be launched. Based on so many factors out there (professional FX camera and 5D line history for example) we can also safely expect an update of the camera within about 3 years of it's initial launch (we're about 3.5 years since D700 was first launched). The fact that they haven't released the D800 yet can easily be explained by the natural disasters Nikon had to deal - and still is dealing - with this year. Here again, saying that you're going with Canon instead of Nikon because you don't know when Nikon would update their cameras makes little sense.
There is a reason canon still has the market... Other than the video it is the fact that they connect with their customers. For stills Nikon has the better product but this is just one reason nikon will never have the market...
Kyoshi, I believe Canon used to have the market. Their market share had been declining while Nikon had been steadily closing in on them. There are probably many reasons why Canon gained the upper hand in the DSLR market in the beginning but I can think of a few:
1. Nikon's DSLR offerings in the past were not as stellar as Canon's.
2. Canon have had FX cameras since 2002 (something that would influence professional photogs which in turn influences consumers and enthusiasts) this is not to mention APS-H (the old 1D line) which they've had even longer. Nikon on the other hand launched their D3 in 2007.
3. Canon's original 5D allowed even enthusiasts and ordinary consumers an opportunity to shoot FX. Even if they couldn't afford or justify the 5D at first, many bought a Canon anyway just because someday they might upgrade to full frame. Canon had their 5D out 3 years before Nikon launched their D700.