Scribit is a vertical plotter that you hang, using wire, from two nails placed in your wall. After telling the device (via smartphone or computer) what the precise distance is between the nails, it can now draw on your wall, from files that you feed it, with accuracy.
The thing distinguishing Scribit from other vertical plotters is the proprietary ink and an internal erasing mechanism. This allows it to erase what it’s drawn, and the MIT-based developers envision it being used to turn walls into large-scale, refreshable “screens:”
Scribit was successfully crowdfunded earlier this year, and you can still pre-order one here. They aim to begin shipping the first models in January of 2019.