Upload & Sell: On
Rob -- I disagree, and I'll tell you why (from a non-technician).
I think Canon is starting to get the first feedback from several market segments that could make it necessary to have dual 1D series bodies again in the near future. The primary reason is high MP demand to counter the new full frame Nikon bodies, somewhere in the 35-45MP range. High FPS, fast AF, and large shot buffer takes a lot of computing power in-camera, and I think these features would have to be too limited in a class leading high MP model. That won't cut it for sports, birds, or even fashion shoots.
Canon was right earlier that it was easier to get more from less, by using a high quality smaller sensor. APS-H is a great compromise in quality/speed between the crop and full frame, and why it lasted so long. Plus many people enjoy a camera that crops the "worst" imaging areas out of the picture frame.
I can imagine Canon offering a 24MP APS-H "sports" model, and a 45MP full frame "studio" model along the lines that they used to.
The 1DX is a great camera, but there is intense demand for a higher MP, higher DR camera that the 1DX can't fulfill.
So, like Canon, never say never!