What is Micro-casting? Well, broadcasting is sending a TV signal over the airwaves, cable-casting is sending TV over a wire, multi-casting is sending TV over the Internet to large numbers of users, and narrow-casting is sending TV over the Internet to small groups of people. Micro-casting is sending TV to individuals.
What's the difference between microcasting and a bad TV show with a really small audience? Microcasting is semi-interactive and can address individual people by name. So it's a bad TV show with a really small audience of friends rather than strangers. Although some friends are pretty strange, and some strangers are pretty friendly, so everyone's welcome after all.