Sony Ericsson has filed for a US patent for a "Mobile Communication Device with Built-In Projecting Screen" that could translate to a smartphone with an integrated pico projector. The device shown would also get a fold-out screen surface onto which that pico projector will throw the images on. From the technical drawings taken from the patent, it's not likely the projector is made to work without the fold-out screen, however....
Source : http://feeds.electronista.com/click.phdo?i=5ccd4bf...
Source : http://feeds.electronista.com/click.phdo?i=5ccd4bf...