This is not an observation or hard fact. Just some thoughts.
Some time ago i remember reading that PF is digital only, sensor related problem, and CA is lens one, much less pronounced on film. Or the other way around. Actually i think its almost the same thing, just PF is effect produced as a result of CAs (like you could get green/red aberrations if the lens was constructed such way), since it is pink it's called PF.
Now, for the difference between cameras, sensors and film, and why theoretically it could be cured. If you know a little about lens corrections, you will also know that they do not bend all light equally, but are more or less optimized to visible spectrum. Simple illustration borrowed from wikipedia shows how well each type of improved lens correction helps focusing all colours at the same point.
Grap for APO chromatic lens:
Graph for Super APO chromatic lens:
You can clearly see that even with Super APO lens the graph rapidly deflects when leaving visible spectrum. If you have some older lens with the red infra red focus correction mark, you can imagine how much out of focus invisible portions of light spectrum can be. I think it's even worse with UV.
Since the film has different type of colour layers (Yellow/Magenta/Cyan) than digital cameras (Red, Green, Blue) you will have different spectral responses and final rendering of those colours (like you get bluish tint from IR component on hot objects glowing red). If you've took pictures of UV bulbs, you'd see a lot of additional blue/pink colour when shooting with most digital cameras, where film would have more correct representation of visible scene.
From this we can conclude that improving colour filters and better filtering invisible light components can have effect on reducing the registration of light that is not any more
corrected by lens, so reducing haze, CA's and improving image contrast.
Btw this is an interesting topic showing one of the areas where sensor design can give great benefit to picture quality other than noise and resolution improvements.