I can't even lift a G70 by myself! But I wouldn't mind a remake of the BK9 with all of its bugs worked out.
Or this: (Hammond S6 chord organ. Probably the first mass-produced Arranger)

Or, this: (Kawlabo Spiron EM-5100)
Or this: (Dualo Du-touch L)

Portable auto-accompaniment! Because some of us aren't coordinated enough to pump a bellows and push buttons at the same time!!