Interaction design helps humans relate to the computer systems framing our daily lives more with each passing year. The beauty of the NYC subway vending machines is largely in how easy its design helps users to understand how to work it. But for me it is also in the materials and color coding that is really very attractive.
Fast Company Article: Why-does-interaction-design-matter-lets-look-at-the-evolving-subway-experience
Review of the exhibition, Talk to Me