It's funny how records from the 70's were getting better all the time.
Movies took a little longer to catch on.
Earthquake (1974) was one of the first released with Sensurround. Some theaters even were equipped for a quadrophonic mix, with an extra woofer placed on the floor behind the screen, so the theater would vibrate during the earthquake scenes.
Unfortunately in many theaters this caused plaster to fall from the ceiling.
But none of this mattered when the movie was shown on TV, since most TV sets at the time had tinny little 3-inch speakers.
Star Wars, I believe was the first presented in Dolby. Great leap forward, but again, the progress wasn't as noticeable watching it on TV.