Realistic hopes: Smaller Size, more of everything else (dynamic range, ISO, FPS). If FPS gets high enough then an electronic global shutter would be cool.

Hallucinogenic hopes: Interchangeable senors - I.R., Uber low light, uber high mp. (a lens that can resolve it would be nice) With dual pixel/live view focus perpendicular to the axis is more important that precise distance to the flange (remember I am hallucinating).