[pantulis]

I think the dynamics is a solved problem in terms of technology: at the extreme, you only need to sample every note for every expression level, it's just that it's not feasible in terms of hardware cost. Then you have damper resonance but todays high end models have some implementation and given that it's software one can expect great advances there in terms of modelling (soundboard resonance will be there).

Regarding keybed, the Kawai MP11 is supposedly the best with wooden keys and long pivot points, but again it's a matter of expectations and obviously a professional player will be able to tell the difference.