Yes, Yamaha will have a replacement out by the end of this year. I was told that it wouldn't be shown at the July NAMM show this summer but is still on track for October, November release. And yes, I was told it would be an amazing keyboard for the dollar spent.
Thanks George for the info!
I also am sad that it will be such a long wait. I have to bring one of my S910's in because the "EXIT" button is becoming unresponsive. I've been playing it every day for 3 years, and it's held up pretty well.