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Neat idea.
More details at
kickstarter.com/projects/1149624989/bea ... y-light-so

Neat, but at a 100 lumen, you'll have to make the place really really dark for it to be visible

Running Android in the device (and keeping that up to date, who is going to take care of that) is also not a really good thing from a security perspective.

And it is not like there are already picoprojectors available in any store near you with better specs.