We’re used to seeing this on mobile design, but now we are starting to see it on desktop as well. These trends in main navigation for desktop definitely makes designing & coding the responsive design much easier and more intuitive. This type of interaction has quickly become the convention, and I have no hesitation in adopting this for my next desktop design:
Big honkin’ menus of the past are now neatly compact and out of the way, yet it is still very accessible and usable with one click.
http://craftgawker.com/popular/favorites/page/10/
3/11/14 And Now the menu on You Tube:
View these examples of trends in main navigation for desktop.
http://www.falconsocial.com/feature/social-media-management-services/