Nothing amazing..."soon" could mean almost anything...weeks, months...
For some reason, I don't think the PA4X is too too far away.
What might be a real eye opener is if Korg makes a semi-weighted 76'er of the PA-600, something similar to what they did with the PA-588 (only that had 88 weighted keys). I'm not sure if the PA-588 has been discontinued or how well it did sales-wise.
Competition keeps the companies on their toes, and almost always benefits the user.
I doubt if Yamaha would have done the Tyros5-76 if Korg didn't have a 76 TOTL that appears to be doing quite well (certainly better than the BK-9).
Sales numbers are extremely important, as some of that revenue gets put back into research and development. The TOTL instruments allegedly bring in a higher profit, and play a major role in paying off development costs and advertising/promotion campaigns.
They also represent the state of the company and it's commitment to introducing new technology.
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.