...well, if they attach the Ipad, I am all for it!

I understand what you are saying, we'll see how things will develop with Roland arrangers.
I just hope they add a proper break fill to styles! ;P
I dont mind if its Roland that does this, tough they seem like the most likely since they are currently really pushing things in different directions..
But i could also see Korg creating such modules based on Kronos or PA4x
However, i dont think yamaha will set this step with one of their topmodels, if they ever do so, they will try a lower tier instrument, and then wonder why it didnt work out..
There is one thing i know for sure, workstations and arranger workstations in the traditional 19" rack module form will not work, you want the controlls directly in reach