Apple has been awarded a patent to tie multiple smartphones together as an off-camera illumination system
Smartphone "flashes" are terrible. Yes, in some cases they're better than nothing, but most of the time you should avoid them like the plague. But a new patent awarded to Apple could substantially boost their capability, by tapping into other devices around you to function as slaved off-camera lighting. By linking together your iPhone with those of a number of friends, you could provide a substantial boost to the lighting of a situation.