I have to confess, I haven't heard anything yet other than the arpeggio stuff that I hadn't heard in the GW-8. I know Fran still has his Prelude (I only had the GW-8 on loan from a friend) so perhaps he could chime in if there's anything radically new, but I am willing to go out on a limb, and say this is FAR more likely to be based on the Sonic Cell chip than the FantomG. You'll see Roland come out with a new module long before you'll see new technology rolled into a low cost arranger or WS. Sonic Cell predated the GW-8 and Prelude by what, a couple of YEARS?
It seems that Roland share much in common with Yamaha, rigidly separating WS keyboards from arrangers. Lord knows when we are ever going to see the first MOTL arranger with ANY decent arpeggiator (arps play whatever notes you feed them, arrangers interpret what you play and try to substitute it with a chord) or a proper multi-track audio recorder capability on them.
I'm sorry, but I simply can't get too worked up about this thing... Favorite Performances? Isn't that what we all have? We just call them Registrations, or UPG's etc.! And, I'm sorry, but everyone posting here on even the lowliest laptop has more than enough horsepower to run a MUCH more capable eight-track recorder than this thing has.
But, with batteries, it will pair Fran's BA-330 nicely for those campfire raves we all attend so often!