I would think a $4500+ TOTL keyboard would strive to have the latest in technology, but USB3 and HDMidi??? Maybe for studio freaks...

I can't name the features I'd like to see, but there are many improvements available in the vocalizer and mic section, including more dedicated knobs and buttons. What about a 73-key option - an extra octave would make the TOTL really stand out. Real drawbars/controllers ala Roland G70/E80, etc...

That being said, I can't afford a $4000 arranger, so I will have to wait even a few more years for a trickle down MOTL board.