i believe a fisrt step toward that was roland's morphing function, unfortunatelly they decided to drop it.
i think this would be indeed revolutionary, and it could be done, since karma already has it, but i have to use my old theory why that does not happen: the manufacturers prefer to keep the market well defined at this time, between synth/workstation and arranger division.
at one point in time, i am sure we'll see this and other great features, but right now they can live quite alright without implementing them. ;( maybe they would like to keep such a hybrid arranger/synth keyboard as the ULTIMATE instrument, which they do not want to release yet. eventough i believe they could.

dreamer, i posted after you... really, having a "style generator" is much more than that; you could generate more or less random tracks that could sound from unexpected to extraordinary. that would fit new dance/electrica styles so well.
but arranger market is just not meant for that...

[This message has been edited by adimatis (edited 10-27-2008).]