The Quadricycle doesn't get much attention these days. Sure, it has a page in the Wikipedia and lives on at The Henry Ford museum, but that's pretty much the extent of it. When we think of the first commercially successful automobile we think of the Model T, not the Quadricycle.
I'd argue that we're in the midst of our own "Quadricycle" era in the digital content world. We might think we've come a long way with the latest formats and devices but we're still in the very early stages of digital content transformation.