Details in design matter but moreso when you are creating a series of visual forms that provide people with information they need in such a small space. Details are also then more noticeable and important than larger scale projects.
I was personally stunned by the elegant wayfinding pictograms of Stockholm's Mall of Scandinavia paired perfectly with the typeface. It's information design at its finest.
I'm still trying to find who's responsible for this great work. If you know, pass on the knowledge!