It’s going to be interesting to see what weight point the 88 note version comes in at. The problem may very well be that gigging pros that use arrangers tend to be pretty elderly nowadays, and a full weighted 88 might come in at too high a weight for them to easily solo move it.

And the ‘home’ 88 key arranger player tends to look for something a bit more decorative and piano looking, like Yamaha’s top end Clavinova’s.

I have a feeling that the 88 may be a bit of a lame duck. Neither fish nor fowl…

For the last 30+ years, the sweet spot for me has been the 76. ‘Just’ enough to play most pop piano, light enough keys for organ and synth parts (but not so light that piano feels really wrong!), light enough to gig without getting a hernia!

One major difference between arranger pros and workstation pros is, most WS pros play in bands. You get help moving your gear! The solo arranger player is usually on his/her own. In truth, Korg’s are at the upper end with regard to weight at the moment. And the leaked pictures don’t seem to show any significant change in build quality and construction. That’s going to make that 88 a tough sell for 50+ year old players…
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An arranger is just a tool. What matters is what you build with it..!