Startup Idea: Mobile Projection App

Startup idea to develop an application that can project images from Android and iPhone devices to walls using a built-in hardware projection device.

There should really be a projection app for phones. Android and iphone.People should be able to project images on walls, using some sort of app and projection device on the back/front on the phone. This seems like it would be quite simple to do, and make you guys tonsssss of money if you actually pursue it.