We have seen prototypes of mobile phones with an integrated projector and we have heard that these are coming. Epoq, known for selling MP4 wristwatches is now shipping a GSM phone with integrated video projection capability.
The Epoq EGP-PP01 is a tri-band GSM unlocked mobile phone with touch screen, media player and more. The integrated micro-projection module can project stored images and video as large as 30 inch diagonal. It can also be connected to DVD players, portable media players, and other video sources to project the signal.
The resolution of the projector is 640 x 480 pixels and the battery lasts for 2 hours when projecting.

The Epoq EGP-PP01 is selling for $549.95 on GadgetCraver. I have no idea if this phone is any good, proceed on your own risk. If you got one, please let me know how you like it.