>1) H.264 video + AAC audio + MP4 container as industry standard
Just to take this discussion further off track:
I think it's interesting to look at the technologies used as standard by pirate groups. Since they are already infringing copyrights, these people tend to have very little interest in any legal or philosophical issues attached to any particular technology, and gravitate towards the technically superior solution.
For HD, pirated video is almost exclusively H264, plus AAC or Vorbis (no clear winner here), in a Matroska container. For whatever reason, nobody seems willing to use MP4 unless they have to for compatibility with hardware (and perhaps software) produced by companies with a vested interest in that container.
Not especially relevant, but I found it interesting...