have a read of this thread that i stated 2 years ago.
http://www.synthzone.com/forum/ubbthreads.php/topics/292255/1Its a long thread .At the time i had a very nice sparring partner called Diki and we talked about the difference between work stations and arrangers and the similarites .
The future is happening now just as i predicted.
Workstations have taken on more and wore arranger features and soon there wont be arrangers keyboards just work stations with pretty much all the arranger features or arrangers with all the workstation features. My brother who has the yamaha XS has just bought the Karma software to laod on his computer to play on his yamaha XS . This will speed up the music making process and he has finally accepted the benefits of arranger like features and he was the biggest opponent out there. So will the rest of the market eventually.