My friend Richard Stanley lives in Laughlin Park, where Cecil B. DeMille, Charlie Chaplin and W.C. Fields built their Hollywood mansions. The Reatta posed for his camera here and there in the neighborhood.
It seems the Reatta was inspired by the 1983 Buick Questor show car.
The Questor had two computer screens, predicting GPS, back-up camera, and touch-command controls. While GPS and back-up cameras were a little further in the future, a very similar touch-command screen did indeed turn up on the Reatta and other high-end GM models.