vine's awesome. It's (technologically) impressive, addictive, fun, and beautifully designed, but I'm not sure if it can grow to be as big as Instagram or Snapchat. Videos (even 6-second 'GIF's') are not an easily digestible medium. By that I mean that you need the necessary bandwidth (macro-based infrastructure) and time (micro-based user attention) to consume them. Conversely, photos, a la Instagram and Snapchat, are easily digestible: quick to download and quick to view.