Nobody from Korg that I know of has said anything about "Redfine keyboard design"....
Here is the direct quote from the Korg Webpage
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Pa2X/Pa800 Operating System Version 2 soon to be released

OSIMO (Italy) — Heard the rumours? We are hard at work on a new operating system for the Pa2X Pro/Pa800 packed with exciting new features that will make you think it is a whole new keyboard.

Except, we are saving you the money and putting these features into a no charge upgrade!

Want to know more? Then look out for Saturday September 13 when we will be publishing details of the incredible new features we plan for OS2 – and also the date it should be available for download!

Please stay tuned!

The Korg Italy Team
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Anything else, I suspect is pure hyperbole and excitement from keen users/demonstrators.

Dennis