It would be cool if casual wear was dapper again

I know this is from a movie, but still, would it be so bad if the fashion was simplistic but formal-ish again?

I would include 1960s in that if you watched Mad Men (the show that revived the dapper look in the late 2000s).

Honestly I don’t think the formality is ever gonna come back. Imo these stretchy and sweatproof materials are the futuristic fabrics people wondered about in the twentieth century. Plus it’s getting too hard to enforce dress codes, now that we’re more knowledgeable about gender identity and sensory issues, never mind personal style having a greater breadth than ever. That said, I think our ever expanding perception of what’s acceptable includes concepts of being over dressed, not just under. I’m at least hoping we’ll have been exposed to enough clothing styles eventually that we don’t feel location or others dress has to affect the way we dress. The concept of our society getting informal and relaxed doesn’t have to kill old customs and aesthetics if people actually like them. 

An interesting related phenomena is “Dapper Day” at Disney parks. It originally started as an ode to when Disneyland first opened in the 50’s and visitors would wear suits and party dresses. Many people like taking photos at the park all dressed up now, and enjoy the classy feel. While it’s a fun concept, I also wouldn’t want it enforced on me all the time. Being a special occasion is what makes it novel. 

There are these dressy sweatpants you can get at Lululemon. You honestly can't tell they're sweatpants until you touch them. They look like regular dress pants. They're apparently as comfortable as sweatpants too. They cost like $200 and I don't need to dress like that so often that comfort becomes a concern, but if I did I'd know where I'd be getting my "dress" pants