The simple text box makes the Internet a growing, interactive medium. You can add photos and star ratings, but a text box is where the magic happens.
Forms are everywhere. They are the part of the web where the money gets made, where the content becomes “user-generated.” Without forms the web is merely a publishing medium—a set of linked-together pages created by interested parties. With them, the web becomes the white-hot center of public discourse and the world’s largest bazaar.
Such a simple thing, not changed much from the earliest days of the web, but still powerful. A time traveler from 1995 would be baffled by much of Facebook or Gmail, but they’d recognize the text input form.