Personally, I am waiting for Yamaha and Korg to catch up with the Roland's in certain critical areas, myself!
This 'fanboy' is in no rush to go out and buy another arranger with WORSE capabilities than the one he already has, just for a few well articulated sounds
Roland may be taking another tack from Korg, and waiting to announce any new arrangers with their version of this technology until the content is ready to go with it. And they are taking a different tack to Ketron by not announcing anything until it actually WORKS!
In the meantime, were I Yamaha, I would be getting nervous... The PA800, once the content gets updated, is a pretty stiff competitor to the T3, but with speakers and nearly $1000 LESS...