The specs we know so far are:
6.78 inch OLED display (possibly 144hz again)
6000 mah battery with 65 W charging
Headphone jack with an high end ESS dac
Secondary "Rog Vision" display which can be customised and an anime matrix like display on one model
Possibly multiple variants 8/128, 12/512 , 16/512 , 18/512. (normal,pro,ultimate)
Improved cooling
Aero active cooler with new design and two physical buttons
Better air triggers with possibly more on the bottom in some variant
Better display sampling rate
Possibly more new stuff we just have to wait for the launch tomorrow