It seems to me that the future would be like Genesys where Everything is in flash or something like that.
So one would buy a very cheap hardware with no sounds and styles. Then one has to buy those separately from 3rd party manufacturer. In this case, Yamaha would be more of a software company providing such sounds and styles libraries; while Casio provide the cheaper keyboards. GeneralMusic will provide the high end keyboard.
If I have a question is that how much did it cost Yamaha to develop these sounds and styles as a percentage of the cost of the whole Tyros?