To me it always seemed as if Yamaha is surely able to do the ultimate Piano since they had the CP1 which was/is a great stage piano with superrealistic sound.
The CP1 is 10 years old now and maybe it´s time for a new model to follow up because there is new technology needed in this piano like

- built-in audio interface
- updated SCM sound engine
- additional sounds like layers and strings
- mac/pc editor
- newer piano models like CFX grand or bosendorfer
- ability to load samples
- updated piano action

If Yamaha would also reduce the price of the CP1 a bit it could be a great stage piano to go for. I would love to see an updated version of the CP1.