I recently came across the what3words coordinate system in an outdoor magazine. The system divides the world into squares of 3 m x 3 m. Each square is then named with a combination of three (as far as I understand) arbitrary words, but each three word combination denotes a specific square. Buckingham Palace entrance in London for example is fence.gross.bats. The magazine described the idea as revolutionary and that it will probably make a big impact.
The trouble is: I do not get the point. For what purpose is this system really useful? Are there specific cases in which it is superior to, let´s say the geographic coordinate system? If you use a (latitude,longitude) combination of decimal degrees with six decimal places like (51.501381,-0.141830) and enter them into one of the known map services, you will have an accuracy of approx. 1 m on the latitude (distance of 111km between two lines of latitude divided by 106) and an even better accuracy on the longitude. So accuracy cannot be the point.
The only advantage I can think of is that three words are a bit easier to memorize than a combination of numbers. Do I miss a point? Has anybody used the what3words system seriously, i.e. not only played around with it?