Stef, there is a limit in how good a camera needs to be.
Even if we get to the point where you can get Large Format quality images from a 1Ds mark X, it would probably be so unecessary that the manufacturers will never bother to make it.
I started with MF Canon and have worked my way up through to a 10D with a detour to Mamiya along the way.
If I honestly look at my 10D now and say, "what does this camera lack for my photography, both for my wedding and landscape work". I won't hold any futuristic bars on my fantasy.
FF, 16-22 megapixels of resolution with incredible noise control, Instant response and write times, Dual card slot for redundancy, DR of B&W film minimum, a LCD which will be bright and clear in the strongest sunshine and is colour and exposure accurate, IS and anti-dust mechanism on the sensor, perfect ETTL flash control, much better ergonomics of the body, ability to focus anywhere in the viewfinder, silent mirror/shutter, AEB over 5 stops, mirror lock up switch and a #### switch to change from One Shot to AI Servo etc
How many years until a body like this becomes standard at an affordable price? Some of those features are already in the 1Ds mark II, what more would I need for convenience when taking photos before it starts getting unecessarily silly?
In the old fashioned 'film' days, top pro bodies were updated only once every 5-10 years or so. the 1N-1V, the F5-F6, and these upgrades were not in any way drastic, slightly better this, added compatability with that....
I have no doubt that within the next 5-10 years the DSLR world will slow down to this pace of upgrades, who wants video or 3D in a pro DSLR anyway?