Basically, they are cocktails which are made either entirely or partly using the new techniques of molecular gastronomy. The cocktails obtain a different consistency which almost confuses the senses, clearer aromas and totally new appearance. Or, in other words: the structure of the cocktails is changed, they are mixed differently than before and/or furnished with surprising elements. The barmen looks beyond the rim of the normal cocktail glass and plays with textures (textura: Latin for "tissue") and aromas.
You can read more at VK-Engineering.com.