Thirty-five years ago, John Denver was the host of choice for the Grammy Awards. And because it was also when synthesizers were becoming more and more powerful (and thus more important to popular music), the producers thought it would be cool to treat the audience to a demonstration of what synths could do.
The result was this all-keyboard performance featuring Howard Jones, Thomas Dolby (two new guys riding high on the charts at the time) Herbie Hancock, and Stevie Wonder. Quaint, but still cool. (Thanks to Leslie for the link.)