“Making things look old” is next on the list from http://www.creativebloq.com/design/trend-predictions-2013-11121414. Vintage. Antique.
As designers, we have our little “tricks” we use for this kind of finish. Grunges. Layers. Filters. Color selection. It all counts to bring out such a “vibe”. What was old is new again. Instead of writing about the look, I would love to direct you to http://urdu-mag.com/blog/2012/08/vintage-poster-designs-retro-design-for-inspiration/ where you can explore some great examples and inspiration for such a look.
Also, there is the style known as Steampunk Grunge. This is a great genre to explore when thinking of the vintage look. It brings a great contemporary look and feel to the vintage stain. http://www.bing.com/images/search?q=Steampunk+Graphic+Design&FORM=RESTAB