A couple of months ago I got myself a pocket projector to attach to my mobile phone and laptop. Partly, I wanted to know what happens to the mobile user interface when you blow it up to a metre across. Partly, it seemed like a fun thing to have, just to have it.
I discovered that a pocket projector has many uses…
1. Buy groceries on the fridge
2. Turn your ceiling into a planetarium
3. Customise your t-shirt
4. Twitter-enable a teapot
5. Make a newspaper like in Harry Potter
It was fun making these. I think little projectors are going to be huge.
Matt Edgar writes here 
bloody brilliant!