Well, you'd need a very big camera for this kind of possibilities, because you need space where you can move the sensor on the back, so you need lenses with a bigger coverage. With a big camera it's very difficult to design a good short focal lenght like a 35mm or a 28mm (take the Afi as exemple) and it would be very expensive... Naturally you need to see what it's happening to the image, that's why in a view camera we still have a ground glass, so you need a very good live-view and all the problems we know... Actually, it seems a good idea have the tilt and shift capability direct in the back, but it's very complicated and very very expensive. I think that a view camera it's not good just cause of the movements, but also for the possibility of using those terrific schneider and rodesntock lenses...
I, indeed, was told by a PhaseOne dealer that it's very probable that phaseone and schneider will make an union and one day, i hope not very far, i could be able to use schneider designed optics on my PhaseOne 645...who knows...