Google's 'Project Loon' is currently being tested in New Zealand. The project's aim is to supply internet coverage to remote locations and countries. Many say that the project has more floors than originally thought, because the theory is that not only are there not many Wi-Fi enabled devices in third world countries, but the internet does not have much content of interest for them. How true the second statement is, I do not know but there are always going to be loads of opinions on these kind of subjects.
Google plan to float solar powered balloons in the sky which will bounce internet coverage from house to balloon, to balloon until the connection is then bounced to the ground where there is an ISP.
The balloons will rely heavily on the weather to take advantage of currents in the air. The balloons themselves will have a ground coverage of around 1250 square kilometres. Even though this sounds like a lot, the positioning of the balloons is vital. Imagine a circuit, if you break the wire the current will stop, it's the same here, if one balloon is too close to another and not close enough to the next in line, then it acts like a break in the circuit, whereby the connection cannot be bounced from balloon to balloon, which could cause whole swathes of land are without connection whilst the balloon is repositioned.
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