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I don't know for sure, but I don't think it would work unless it were GPS enabled. Otherwise it would know where it was to know what was around it. Therefore, it would also probably have to be linked to Google maps or earth.

That's cool. In a congested place like NYC I can see having that. I didn't notice anything on his display further than half a mile. In a less congested area I wonder if it would be worth it since you could probably see all those things yourself.