An interesting article here. Thesis: the resurgence of dressing well among young men is a reaction to the Boomer generation's "casual Friday" culture. Most generation-gap stories are, out of necessity, a bit contrived, but there are some great quotations about why to dress up.
For me, creativity and attention to detail in dress is a way of standing out, of drawing attention. That is a selfish concern. But I also hope it suggests to everyone--my friends, my coworkers, passers-by on the street--that I think that they are worth the time and effort spent acquiring, selecting, and arranging the clothes I am wearing. Dressing up is, in that regard, a way of communicating respect toward others.
I hope it encourages civility in the community as as it does in me. When I put on a suit and tie a fat Windsor, I feel the liberating weight of tradition, of my ancestors, of my profession, and of a gentleman's obligations.