Perhaps most obvious was the addition of Chinese motifs to the mix of decorativeelements in architects' design repertoires of zigzags, curves and chevrons.
Deco fell out of fashion when a new generation of designers took the idea a step further: Seeing even Deco's stripped-down decorativeelements as excessive, they eliminated them altogether.
This is why Apple is in the perverse position of arguing that design elements which make good smartphones so useful are not functional at all, and merely decorative ornamentation: if it admitted these features were actually useful, it would forfeit its design protection.