One great example is cut off shorts, also known as "Daisy Dukes." This style of shorts was a huge hit in the '70s but after a few years they died off for a little bit. Then in the '90s, Cindy Crawford brought them back with the introduction of her Pepsi commercial. The surge of cut off shorts came back for a little while and then died off again. Now they are back and sell for ridiculous prices. They are advertised as the next best thing and the new, modern way to dress when in reality they have been back and forth in society for decades.
Another example of the past being coming back is in the new movies being released. With the release of "Bohemian Rhapsody" and the soon-to-be-released "Rocketman" some of the secrets of the stars that were in the charts decades ago are finally being uncovered. These stars are getting a fame reboot because of societies fascination with the past.
Finally, the reinvention of the iPod. The device I always wanted as a child but when I was finally allowed electronics, was already way past its prime. Apple's big new release is nothing other than a reboot of the iPod which is a bit more high-tech and is now selling for between $199-$399.
As society continues to advance and push into the future, the past makes its way back, again and again, into the lives of those who follow the trends.