In the Czechoslovakian 1980s TV series Návstevníci ("The Visitors" [0] - available dubbed in other languages) - the people in the future all are bald. They all use wigs though, different ones. I guess the show decided on having wigs so that the actors didn't all have to shave and only the first few initial parts of the series, those that play in the future (the rest is in 1984), had to be played with only a few seconds of baldness. Otherwise they would probably have gone for complete baldness as the haircut of the future.

By the way, that is one of the best TV series ever. Time travel involved but that really doesn't matter, only once to set the stage, not used to fix plot issues or to have an excuse not to care about the logic of the storyline. Absolutely captivating, like all those Czechoslovakian series from that era. Without any violence at all. If there is an English version, dubbed or subtitles, do watch it. It takes off slowly, it really only starts "for real" after the 3rd part or so, after they arrive in 1984.

By the way, the title music still sounds pretty good: https://youtu.be/_1MlEqeXD-8

[0] https://www.imdb.com/title/tt0165019/