DP-Paris - mate you've got that one a bit wrong... the 1D and 1Ds have NOTHING in common... they're totally different cameras haha. If anything the 1DsMk(X)-5DMk(X) share a relationship and the 1DMk(X)-7DMk(X) share a relationship.
TBH though, I personally think its a bad move. I think everything should be going to full frame. The sample images are pretty soft, and not one lens canon sells can out perform the density of the sensor. I'd have rathered a 12-14MP FF with 5FPS 14bit with all the nice low light capabilities. Cleaner high ISO's would go down a treat with people who shoot gigs, weddings etc. and would have made a perfect modern backup to a 5DMkII.
Alas, it was not as I hoped. Looks like I'm still ordering a 1DsMkIV
God people care about AF Points? Manual focus or center point. I wouldn't trust any cameras AF system on auto. None are perfectly, fortunately my vision is pretty darn good, and last I checked, I had the final say on what I focused on. So if the center point can't get it, I Manual Focus it. Saying that, I rarely have to.
You should all be making more of a fuss about Dynamic Range, 14bit vs. 16bit (instead of Nikon who are clinging to 12bit for some god forsaken reason!) and better lenses! The AF system or your creativity are both wasted if the Image quality isnt perfect!
I think you misunderstood my point. I was not saying they have things in common, rather the 1D is the sport model to the 1Ds and the 7D is the sport model to the 5D.