*** Nearby Bluetooth devices: https://wiki.mozilla.org/WebAPI/WebBluetooth
** Device properties:
*** Storage: https://github.com/mozilla-b2g/gaia/blob/master/apps/settings/js/app_storage.js
-** Environment:
-*** Ambient Light: http://www.w3.org/TR/ambient-light/
-*** Proximity: http://www.w3.org/TR/2012/WD-proximity-20120712/ - https://hacks.mozilla.org/2013/06/the-proximity-api/
** Video analysis
*** histograms, etc.
* Make output more beautiful