Could projector phones be the next thing? 

It sounds a bit silly at first, but a few companies have them in the works.  Chinavision even has one on the market now (see second vid below).  And if the first youtube vid is any indication of where the functionality may go, look out.  It might be a bit awkward to use in a crowded store or at work, but one can imagine lots of interesting applications.  
Think about how cool a phone with gps, accelerometer and projector could be:  One can imagine people (and of course companies) actually “storing” pictures, videos, text, in the realworld environment–on the sides of specific buildings, on the floor of shopping aisles–that would only be visible when someone using the right app shined their projector there. 
Could the whole world become a point and click interface?


Here’s a demo of Chinavision’s projector phone:


Projector Phone - Tri-Band GSM/GPRS Touchscreen Cell Phone