This is very similar to another product that you can buy today https://www.adafruit.com/products/1652. It's basically an iPad 3/4 retina display that connects via DisplayPort. The main differences seem to be that the Kickstarter one will run off USB power (instead of 9V) and attaches to your laptop screen.
I've been tempted to try it, but can't really think why I'd need it.
I've been tempted to try it, but can't really think why I'd need it.