I wonder about the sitting position. One of the reasons I purchased the Rocket is I was getting too far in years to lean over the gas tank.
When the Rocket moves on, it might be neat to have a supercharged smaller, lighter, still comfortable cruiser.
Remember after the fuel crisis, a number of manufacturers (cars) offered supercharging in one form or another to allow reasonable performance with smaller displacement engines.
I note on the OP's link, Kawasaki claims the supercharger and other changes allow the bike to have reduced emissions.