it's not hardware and doesn't exactly what you'd like, but have a look at MIT's Junkyard Jumbotron: http://jumbotron.media.mit.edu http://jumbotron.media.mit.ed

it's not hardware and doesn't exactly what you'd like, but have a look at MIT's Junkyard Jumbotron: http://jumbotron.media.mit.edu http://jumbotron.media.mit.edu Essentially a bit of software to add other devices (ipads, phones etc.) as virtual screens