Pictures say a thousand words right? . With this technique, you can blow up a picture and create a full wall's worth of wallpaper. I don't know if I'd throw a picture of Mom up there but the idea is pretty cool.
From Geekdad:
The solution was found in Illustrator’s Live Trace feature (links to .pdf). With a little finesse, the photo was transformed into a scalable vector file. I emailed the image to the printer and – a short time later – the wallpaper was installed. The final product had a latex coat for protection from crayons and juice and is expected to last five to seven years.Large Format printing as Wallpaper by Wired