Like Spinal Tap, watching TV on your smartphone is really big in Japan. For whatever reason, however, the practice hasn't caught on in most other regions. Handheld antenna TVs were actually fairly popular back in the '90s, so transferring that functionality to smartphones seems like a no-brainer. However, the idea hasn't really taken off. To begin with, not many services stream broadcast TV, so it follows that there would not be many ways to watch such content on a smartphone. Aereo, one of only a handful of TV streaming services in the West, doesn't even have a dedicated mobile app. Streaming content from services like Netflix and Hulu is just easier and more convenient; would you rather tune in halfway through a show and deal with commercials or start and stop shows at your leisure?