DSLR development appears to be reaching a plateau, and sales seem to be reflecting this. The 70D is basically a consumerized version of the 7D, similar to how the 6D was a consumerized version of the 5D2. I don’t really think there is as much room for a 7D2, as the 70D is probably good enough to basically replace it. The image quality of the 6D/5D3, and the AF advantages of the 5D3 probably have also sliced off a significant share of potential buyers. There is likely a bean counter somewhere that has figured they would be better selling more 70Ds, 6Ds, and 5D3s than having to produce and market another camera in the current economic climate. By next year these cameras will all be mid-cycle when they can re-evaluate the marketplace and put out a 7D2 to goose sales if it makes sense.
Agree, but speaking as someone who made the mistake of getting a 60D instead of the 7D and now realizing its limitations (AFMA, better focus points, etc) - I will be boycotting these marginal upgrades and hoping others will too, in favor of true market "re-evaluation." I can see the lure of improved videography with the 70D, but there's a notable absence of high end photography features to make me drop more "camera cash."
Canon fooled me once with the 60D and am waiting for the next true sports camera, rather than settling for another marginal 60D upgrade. Lets see a novel APS-C camera with 20+MP, an AF point system on par with the 1D, good iso, and I'd be first in line to buy! That'd be an awesome 7DmkII.