I believe this is the direction to develope a future new generation of arrangers: modularity. Something roland tried with GW8/Prelude, but even deeper: buy the keyboard with empty slots for "styles packages". Then you simply add in the styles you are interested in and... giddi-up-go!

And why not, the same could be done with sounds. Open-systems are all great, but maybe I don't need all those fancy things, I'd be happy to have a set of good sounds, particularly suitable for the music I play... So, give me a set of basic sounds (why not, the GM old format, but new and realistic sounds) and then let me buy some more if I need (well, not Yamaha's way, asking ridiculous prices for a set of sounds, but you get the point). Add to that a comprehensive set of tools for editing, and I'm sold!

The first manufacturer to do this will get the cream, I am sure!!