Early to mid 70s Hancock is classic EM/jazz funk. HEADHUNTERS is the peak, with the ARPs and Moogs.
I think ROCKITT is hopelessly, unfairly overpraised. It's just a jazzy, guideless rip off of the Trevor Horn production BUFFALO GALS. After about 30 seconds it is just tiresome. The far superior AXEL F was a thematic, melodic variation on the same thing and I think that's a much more satisfying listen. Amusingly, Hancock's score to the movie ACTION JACKSON is a painful rip off of Harold Faltermeyer meets Watermelon Man.