After I checking it out, I could see why it made that list of events! It's got to be one of the best representations on the subject of leather jackets. Yes, it's a bit biased to the motorcyle angle but those two things belong together and are shown perfectly together in this exhibit!
Even back in these early days of motorcycle history you see examples of mass market leather jackets catching on. My favorites being one you could purchase from the Sear's catalog, and the baby leather is obviously adorable!