As far as soft synth arrangers, I think it will be a wave of the future but for most folks I think it is pretty tough to get through the proccess of the learning curve. That is why I stopped playing around with Live Styler and OMB and Jammer whatever it was.
I am surprised that some company or enterprizing individual hasn't started selling soft synth arrangers ready to go for people like me who don't want to screw around with a bunch of computer programs.
I think if this were available, a few hundred good styles and voices using some of the fantastic sounds out there, being sold with or without the laptop, would have pushed me over the edge and I would have gone that route. To this idea add the service of updates down the road for a reasonable price and I think you'd find a lot of players, including myself going this route rather than considering a Tyros 2 or whatever.
As it is, for a light weight good module I chose the only real choice out there now, which is the Midjay.
It was the first Ketron I had ever heard, and it impressed me enough to add it to other product lines that I currently handle.
I would still love to hear some mp3's from someone using a soft synth arranger. Just enough to hear the sound of it. I don't care about the players playing ability or anything. I would really rather hear that than the demos from the companies that sells the different voices. It's just like when I listen to a standard arranger, I want to hear what live play sounds like rather than a sequence, as I prefer to know what I can sound like playing live rather than the other, which quite often is not a true example of what the live style play will sound like.
Best
Scott Langholff