This is great! This was one of the most interesting features of the OLPC XO laptops, and I don't know if that feature ever actually got fully implemented on that platform. I see it as handy for things like a chat app, but it could be absolutely amazing and literally lifesaving in an emergency scenario.
I'm curious, I believe in the XO's case, they had to design the wireless chips to be able to do this. If some of the comments are about Android and Windows devices doing this, is this now a standard capability of wifi? Or some specific chipsets? Or is this done with something like going back and forth between networks?http://www.cultofmac.com/271225/appreciated-ios-7-feature-will-change-world