I tend to agree with Neuro that the "1D build quality" may not mean what some people think it does. It might exceed the 5DIII, but I just don't think there is enough of a market for a $3,000 APS-C camera to justify the kind of bombproof construction the 1D series is noted for. (Unless of course, I'm seriously overestimating the cost of producing 1DX build quality – perhaps it's not as much of a cost factor as I think, given modern production technology.)
The Nikon D800 (and I think D300s) have the same internal build quality as the 1D/D4 type cameras, aside from the improved sealing. I doubt that it adds all that much to the production cost.
Is it feasible that it could be called an EOS 4D
Previously on this forum, it's been stated no, because of the negative connotation of the number four in Japanese culture. Of course, that didn't stop Nikon...
But perhaps gave credence to the Japanese belief
I think it will be interesting to see how the combination of specification and price shed light on how confident Canon are with the FF premium.
I still think the RRP will be the same as, or notionally lower than the 6D, with a camera that is as well spec'd to day as the 7D was for its day. Didn't Canon introduce the now ubiquitous 18mp sensor in the 7D. Maybe they will use this model to introduce another sensor that five years time will make it to the cheapest dslr.
Just a thought; was the Sony Exmor first implemented as a APS size sensor ?