Huh.. what a funny title... Here's why...
Most people DESPISE the true music of the 70's.. bands like Abba, and the new sound of Disco.
Now if you were to talk about reinventing the sound, then Disco, and somewhat Motown would be the re-invention during the 70's, however, Motown was coming up a lot earlier than the 70's...
Granted, there were some great rock bands in the 70's that were changing the style, but Rock was here, and it wasn't changing all that much...
The popular music does seem to change from decade to decade though...
Folk and Rock in the 60's, Disco in the 70's, New Wave in the 80's Grunge in the 90's and Hip Hop and Autotuned "Pop" today...
Music is constantly changing, and I don't believe that any single band can change the sound, but they can influence others along the way.
Travel around the country and see local bands, or local battle of the band events. You'll find it pretty amazing how many of the bands sound the same in one area, but nothing like the bands in another area..
What changes the sound of music isn't so much a band, but rather the label that gets them on the radio...