How should we define menswear today?

Sahariana like jacket and neckerchief
“Smart casual” could be the valid answer. It is a style category, where you make use of classic wardrobe items, yet with a sort of casual elegance. The category contains fine chinos, informal sport coats, nice polo shirts, loafers, scarves, handkerchiefs, but few ties.

Double breasted jacket and camp collar polo shirt
Unlike business casual, which is a competition of being the most boringly and harmlessly dressed person on the job, smart casual is about being well-dressed on modern terms.
The stand of Luciano Barbera in Pitti Uomo 90 was an excellent example of smart casual wear. Luciano Barbera managed to establish a stringent casual blend of items, colours, and textures.
Sadly, Mr Barbera was not present himself. For some reason he is never there, when I come around with my camera.
Photos: The Journal of Style