I'm pretty sure we'll see new TOTL and MOTL arrangers from Korg, and Yamaha, and quite possibly Casio(mid-range at least), so it is mainly Roland's lack of new technology to put in their high-end arrangers that's keeping them out of that segment.

Another re-iteration of the E-80 or G-70 won't sell any better than the originals...even the Prelude and GW-8 are having a tough time competing with Yamaha and Casio for entry/mid level instruments, a market segment the latter two have dominated for quite some time.

A PSR-S710 has far more features than a Prelude, for very little more money.

Ian