Is 37mp enough?
This is the first bit of info I've received about a 1Ds Mark IV in a while.
All that was said is the next camera would be 37 megapixels and we'll see it “soon”.
The best source I've had about a 1Ds replacement has said it would be over 40mp and come in late 2011 or early 2012. Nikon would also be doing a 40+ megapixel camera.
I have no doubt the next Canon flagship will be a revolutionary product.