Imagine a printer that fits in one hand and that can print on almost any surface. The way you use it is to simply wave it back and forth over the surface and laser sensors track the position of the printhead relative to the surface to print text and pictures. This is, of course, the antithesis of what most printers do: track the paper’s position relative to the printhead. It works incredibly well as the following videos attest to. It takes about 10 seconds to print a page.
Printing on a box:
From PrintDreams
Taking a picture with built-in camera and printing on copybook:
From PrintDreams
Smallest printer in the world:
From PrintDreams
Here, the PrintBrush features a built-in camera so you can take pictures and print them instantly almost anywhere, even on the surface of the drums:
From PrintDreams
Read more about the development of the PrintBrush at: popsci.