NAMM was in January. PA3X isn't released until June (at last report)...
If that WAS a finished product, what was the delay? No, anyone that thinks that the NAMM showing was anything other than a peek at a beta isn't really thinking this through.
AFAIK, there is not ONE single 'official' demo out for the PA3X. All we have are amateur videos of these beta units. Anyway, why are we going round this same topic once again? Until Korg put up 'OFFICIAL' demos on their official website, consider everything you see as just a beta peek...
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An arranger is just a tool. What matters is what you build with it..!