The mobile projector study  revealed several interesting aspects. 1) it is faster to browser on the phone screen than using a project, 2) users do a lot of context switches between projection and device – even nothing is displayed on the screen, 3) the users see a great value in it (even if they may be slower). I am really looking forward to further results in this area. It may be significantly change the way we use mobile phones!
 Andrew Greaves, Enrico Rukzio. Evaluation of Picture Browsing using a Projector Phone. 10th International Conference on Human-Computer Interaction with Mobile Devices and Services (Mobile HCI 2008). Amsterdam, Netherlands. 2-5 September 2008.