That would require the generation of a HUGE library of samples in a wide range of styles. Since NO DAW is capable of predicting your stylistic intention and automatically generating the right piano style for your chords, I highly doubt it is either "that simple" or that we would see that happen. Band In A Box is not really a DAW. It is a massive sample library. Yes you do type in your chord changes, but you still have to select the style, key and tempo, then the program uses those variables to choose samples from its massive library.