Better listen to Rico and Tony. I think whatever is coming will be totally different, regardless of Yamaha's history of incremental updates in the disguise of all new TOTL.
Before I would be enticed, it would have to have great (read totally different) drums, more ergonomic size/shape. It would have facility for foot controls other than the bulky, expensive proprietary FC10. (I think that's the name.)
If it is going to mostly audio styles, they had better at least approach the level that Ketron has achieved.
Also, to NOT have a touch screen is archaic these days.
As my friend DNJ says, what's the hurry?
DonM