Just when you think you've seen it all, and you start to wonder about the direction of future technology and where the innovation is going to come from, the Future Interfaces Group out of Carnegie Mellon University pops up to blow your mind. As part of research into trying to solve the problem of how to efficiently interact with the very small screen of a smartwatch, the group has unveiled a rather impressive interaction solution that demonstrates a method of using the skin on arm as a touchscreen to interact with a smartwatch.