I would say, because they are obvious. If you had just watched an episode of The Jetsons and then were presented with a global communications network attached

I would say, because they are obvious. If you had just watched an episode of The Jetsons and then were presented with a global communications network attached to computers with video screens, live video communications would be about the first thing you would think of. If you had also watched some adverts during the episode however, you would probably come up with live video porn, and maybe Amazon.