Since Enrico Rukzio (my first PhD student) went to Lancaster he discovered and advanced a very exciting topic for mobile interaction: mobile projector/projector phones. His group has a great presencs at this year’s mobile HCI (3 demonstrations, 2 short papers, 2 full papers, a workshop). In time for the conference the first projector phone appeared on the market (Cking Epoq EGP-PP01) - as to highlight the timeliness of the work. 
The mobile projector study [1] 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!
PS: see Enrico watching his student present I remember how exciting it is for a supervisor to just watch…
[1] 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.
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