The smartphone boom is a story already told, at least in the Western world. The tablet explosion can't last forever. So what's the next big thing in personal computing?

One popular answer is wearable computing. Apple (AAPL 0.64%) got into the game long ago, in a sneaky under-the-radar fashion, in the sub-specialty of health and exercise trackers. Early attempts like Google (GOOGL 1.27%) Glass and Sony's (SONY 0.31%) smart watches might just be a sign of bigger (or is that smaller?) and better things to come.

In the following video, Fool contributor Anders Bylund explores the next megatrend and its implications for investors. In short, ignoring wearable technology and machine-to-machine communications is a very bad idea.