This is the Automatypewriter by Jonathan Guberman. What is an Automatypewriter, you wonder? Well, believe it or not, it's a thinking typewriter that you can play games on. It even writes by itself!
That's right, Guberman's Automatypewriter can type on its own, and even knows what the user has typed. As a demonstration, Guberman had the Automatypewriter work through a game of Zork, a text-based interactive game from ye olden days. No fancy graphics or control schemes here: just you, a page and your imagination (and a lot of clack-clack-clacking).
Check it out for yourself in the video below.