There’s a Kickstarter project for a product called Beam that aims to build a pico-projector in the form-factor of a light bulb. That’s right, it would screw into a standard light bulb socket.
The Beam projector is designed to turn any flat surface into a projection surface. Beam is a 100 ANSI lumen projector integrated with an Android-based computer hidden inside a light bulb. Using an 854×480 resolution 1-chip DLP projector, the inventor of Beam says it is easy to set up and control with an included Apple or Android app. You can screw it into any light socket or use the included power cable to place it on any flat surface.
Interested? Take a look.