Awesome contest @AnkerOfficial. Personally, I would use it to create a large scale template for murals. My city has a new initiative where they are asking businesses if they would like to donate their wall space for a mural. There have been some good ones and some great ones. The one below was finished just this past month
I love that they are asking local artist to submit their ideas to both the city and business and with the projector, I would be able to help them to get a visual of what it would look like beforehand in real time instead of a sketch/CAD or an overhead projector.
Here is a small collection of them from around my city
Take in mind that these were all either stenciled on by hand or freehand done. I could only imagine what someone could think of if they were able to project it on while working on it. This holds true for even bedrooms. The possibilities are endless, but I would for sure give a crack at creating one for each of daughters rooms, because unicorns are life (as well as they should be).
I could see someone in a major city allowing for their building wall space to become a canvas and having a huge Anker mural for everyone to see.